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Download\" data-canonical-src=\"https://img.shields.io/badge/-Quick%20%20Download%20%E2%86%92-rgb(66,56,255)?style=for-the-badge\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003c/div\u003e\n\u003cdiv dir=\"auto\"\u003e\n \u003ca href=\"https://twitter.com/doris_apache\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/3b0ff497c669831531172ace21ee3c3768008ebfc183cbada4418f36f7fe1057/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d2040446f7269735f417061636865202d3432343534393f7374796c653d736f6369616c266c6f676f3d78\" height=\"25\" data-canonical-src=\"https://img.shields.io/badge/- @Doris_Apache -424549?style=social\u0026amp;logo=x\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n \n \u003ca href=\"https://github.com/apache/doris/discussions\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/d40a8985823c792154de2b5a94bb02f2112f8a57539bd7857c9e60bf1eef9019/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d2044697363757373696f6e202d7265643f7374796c653d736f6369616c266c6f676f3d646973636f75727365\" height=\"25\" data-canonical-src=\"https://img.shields.io/badge/- Discussion -red?style=social\u0026amp;logo=discourse\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n \n \u003ca href=\"https://join.slack.com/t/apachedoriscommunity/shared_invite/zt-2unfw3a3q-MtjGX4pAd8bCGC1UV0sKcw\" height=\"25\" rel=\"nofollow\"\u003e\u003c/a\u003e\n \n \u003ca href=\"https://medium.com/@ApacheDoris\" rel=\"nofollow\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/9abb917357a259c1eed8609b2dd611c7b7ff3e30a70014dc9f08058fb2fe2b24/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d4d656469756d2d7265643f7374796c653d736f6369616c266c6f676f3d6d656469756d\" height=\"25\" data-canonical-src=\"https://img.shields.io/badge/-Medium-red?style=social\u0026amp;logo=medium\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003chr\u003e\n\u003cp dir=\"auto\"\u003eApache Doris is an easy-to-use, high-performance and real-time analytical database based on MPP architecture, known for its extreme speed and ease of use. It only requires a sub-second response time to return query results under massive data and can support not only high-concurrency point query scenarios but also high-throughput complex analysis scenarios.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAll this makes Apache Doris an ideal tool for scenarios including report analysis, ad-hoc query, unified data warehouse, and data lake query acceleration. On Apache Doris, users can build various applications, such as user behavior analysis, AB test platform, log retrieval analysis, user portrait analysis, and order analysis.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e🎉 Check out the 🔗\u003ca href=\"https://doris.apache.org/docs/releasenotes/all-release\" rel=\"nofollow\"\u003eAll releases\u003c/a\u003e, where you'll find a chronological summary of Apache Doris versions released over the past year.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e👀 Explore the 🔗\u003ca href=\"https://doris.apache.org/\" rel=\"nofollow\"\u003eOfficial Website\u003c/a\u003e to discover Apache Doris's core features, blogs, and user cases in detail.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📈 Usage Scenarios\u003c/h2\u003e\u003ca id=\"user-content--usage-scenarios\" class=\"anchor\" aria-label=\"Permalink: 📈 Usage Scenarios\" href=\"#-usage-scenarios\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAs shown in the figure below, after various data integration and processing, the data sources are usually stored in the real-time data warehouse Apache Doris and the offline data lake or data warehouse (in Apache Hive, Apache Iceberg or Apache Hudi).\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/bb6aea3e1f400280ffce293eb1f23ed852f8c918ef6c26ce6a7f08eaf185b35e/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f335f613631363932633263652e706e67\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/bb6aea3e1f400280ffce293eb1f23ed852f8c918ef6c26ce6a7f08eaf185b35e/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f335f613631363932633263652e706e67\" data-canonical-src=\"https://cdn.selectdb.com/static/What_is_Apache_Doris_3_a61692c2ce.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003eApache Doris is widely used in the following scenarios:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eReal-time Data Analysis\u003c/strong\u003e:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eReal-time Reporting and Decision-making\u003c/strong\u003e: Doris provides real-time updated reports and dashboards for both internal and external enterprise use, supporting real-time decision-making in automated processes.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eAd Hoc Analysis\u003c/strong\u003e: Doris offers multidimensional data analysis capabilities, enabling rapid business intelligence analysis and ad hoc queries to help users quickly uncover insights from complex data.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eUser Profiling and Behavior Analysis\u003c/strong\u003e: Doris can analyze user behaviors such as participation, retention, and conversion, while also supporting scenarios like population insights and crowd selection for behavior analysis.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eLakehouse Analytics\u003c/strong\u003e:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eLakehouse Query Acceleration\u003c/strong\u003e: Doris accelerates lakehouse data queries with its efficient query engine.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFederated Analytics\u003c/strong\u003e: Doris supports federated queries across multiple data sources, simplifying architecture and eliminating data silos.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eReal-time Data Processing\u003c/strong\u003e: Doris combines real-time data streams and batch data processing capabilities to meet the needs of high concurrency and low-latency complex business requirements.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSQL-based Observability\u003c/strong\u003e:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003cstrong\u003eLog and Event Analysis\u003c/strong\u003e: Doris enables real-time or batch analysis of logs and events in distributed systems, helping to identify issues and optimize performance.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eOverall Architecture\u003c/h2\u003e\u003ca id=\"user-content-overall-architecture\" class=\"anchor\" aria-label=\"Permalink: Overall Architecture\" href=\"#overall-architecture\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eApache Doris uses the MySQL protocol, is highly compatible with MySQL syntax, and supports standard SQL. Users can access Apache Doris through various client tools, and it seamlessly integrates with BI tools.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eStorage-Compute Integrated Architecture\u003c/h3\u003e\u003ca id=\"user-content-storage-compute-integrated-architecture\" class=\"anchor\" aria-label=\"Permalink: Storage-Compute Integrated Architecture\" href=\"#storage-compute-integrated-architecture\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eThe storage-compute integrated architecture of Apache Doris is streamlined and easy to maintain. As shown in the figure below, it consists of only two types of processes:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFrontend (FE):\u003c/strong\u003e Primarily responsible for handling user requests, query parsing and planning, metadata management, and node management tasks.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eBackend (BE):\u003c/strong\u003e Primarily responsible for data storage and query execution. Data is partitioned into shards and stored with multiple replicas across BE nodes.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/ef5be2df6eb3d39e38131e840b17e2032b91ac5794b8ef62967916e1658a5f54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f616462323633393765322e706e67\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/ef5be2df6eb3d39e38131e840b17e2032b91ac5794b8ef62967916e1658a5f54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f616462323633393765322e706e67\" alt=\"The overall architecture of Apache Doris\" data-canonical-src=\"https://cdn.selectdb.com/static/What_is_Apache_Doris_adb26397e2.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003eIn a production environment, multiple FE nodes can be deployed for disaster recovery. Each FE node maintains a full copy of the metadata. The FE nodes are divided into three roles:\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eRole\u003c/th\u003e\n\u003cth\u003eFunction\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaster\u003c/td\u003e\n\u003ctd\u003eThe FE Master node is responsible for metadata read and write operations. When metadata changes occur in the Master, they are synchronized to Follower or Observer nodes via the BDB JE protocol.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFollower\u003c/td\u003e\n\u003ctd\u003eThe Follower node is responsible for reading metadata. If the Master node fails, a Follower node can be selected as the new Master.\u003c/td\u003e\n\u003c/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObserver\u003c/td\u003e\n\u003ctd\u003eThe Observer node is responsible for reading metadata and is mainly used to increase query concurrency. It does not participate in cluster leadership elections.\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cp dir=\"auto\"\u003eBoth FE and BE processes are horizontally scalable, enabling a single cluster to support hundreds of machines and tens of petabytes of storage capacity. The FE and BE processes use a consistency protocol to ensure high availability of services and high reliability of data. The storage-compute integrated architecture is highly integrated, significantly reducing the operational complexity of distributed systems.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eCore Features of Apache Doris\u003c/h2\u003e\u003ca id=\"user-content-core-features-of-apache-doris\" class=\"anchor\" aria-label=\"Permalink: Core Features of Apache Doris\" href=\"#core-features-of-apache-doris\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHigh Availability\u003c/strong\u003e: In Apache Doris, both metadata and data are stored with multiple replicas, synchronizing data logs via the quorum protocol. Data write is considered successful once a majority of replicas have completed the write, ensuring that the cluster remains available even if a few nodes fail. Apache Doris supports both same-city and cross-region disaster recovery, enabling dual-cluster master-slave modes. When some nodes experience failures, the cluster can automatically isolate the faulty nodes, preventing the overall cluster availability from being affected.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eHigh Compatibility\u003c/strong\u003e: Apache Doris is highly compatible with the MySQL protocol and supports standard SQL syntax, covering most MySQL and Hive functions. This high compatibility allows users to seamlessly migrate and integrate existing applications and tools. Apache Doris supports the MySQL ecosystem, enabling users to connect Doris using MySQL Client tools for more convenient operations and maintenance. It also supports MySQL protocol compatibility for BI reporting tools and data transmission tools, ensuring efficiency and stability in data analysis and data transmission processes.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eReal-Time Data Warehouse\u003c/strong\u003e: Based on Apache Doris, a real-time data warehouse service can be built. Apache Doris offers second-level data ingestion capabilities, capturing incremental changes from upstream online transactional databases into Doris within seconds. Leveraging vectorized engines, MPP architecture, and Pipeline execution engines, Doris provides sub-second data query capabilities, thereby constructing a high-performance, low-latency real-time data warehouse platform.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eUnified Lakehouse\u003c/strong\u003e: Apache Doris can build a unified lakehouse architecture based on external data sources such as data lakes or relational databases. The Doris unified lakehouse solution enables seamless integration and free data flow between data lakes and data warehouses, helping users directly utilize data warehouse capabilities to solve data analysis problems in data lakes while fully leveraging data lake data management capabilities to enhance data value.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eFlexible Modeling\u003c/strong\u003e: Apache Doris offers various modeling approaches, such as wide table models, pre-aggregation models, star/snowflake schemas, etc. During data import, data can be flattened into wide tables and written into Doris through compute engines like Flink or Spark, or data can be directly imported into Doris, performing data modeling operations through views, materialized views, or real-time multi-table joins.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eTechnical overview\u003c/h2\u003e\u003ca id=\"user-content-technical-overview\" class=\"anchor\" aria-label=\"Permalink: Technical overview\" href=\"#technical-overview\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eDoris provides an efficient SQL interface and is fully compatible with the MySQL protocol. Its query engine is based on an MPP (Massively Parallel Processing) architecture, capable of efficiently executing complex analytical queries and achieving low-latency real-time queries. Through columnar storage technology for data encoding and compression, it significantly optimizes query performance and storage compression ratio.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eInterface\u003c/h3\u003e\u003ca id=\"user-content-interface\" class=\"anchor\" aria-label=\"Permalink: Interface\" href=\"#interface\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eApache Doris adopts the MySQL protocol, supports standard SQL, and is highly compatible with MySQL syntax. Users can access Apache Doris through various client tools and seamlessly integrate it with BI tools, including but not limited to Smartbi, DataEase, FineBI, Tableau, Power BI, and Apache Superset. Apache Doris can work as the data source for any BI tools that support the MySQL protocol.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eStorage engine\u003c/h3\u003e\u003ca id=\"user-content-storage-engine\" class=\"anchor\" aria-label=\"Permalink: Storage engine\" href=\"#storage-engine\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eApache Doris has a columnar storage engine, which encodes, compresses, and reads data by column. This enables a very high data compression ratio and largely reduces unnecessary data scanning, thus making more efficient use of IO and CPU resources.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eApache Doris supports various index structures to minimize data scans:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eSorted Compound Key Index\u003c/strong\u003e: Users can specify three columns at most to form a compound sort key. This can effectively prune data to better support highly concurrent reporting scenarios.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eMin/Max Index\u003c/strong\u003e: This enables effective data filtering in equivalence and range queries of numeric types.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eBloomFilter Index\u003c/strong\u003e: This is very effective in equivalence filtering and pruning of high-cardinality columns.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eInverted Index\u003c/strong\u003e: This enables fast searching for any field.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eApache Doris supports a variety of data models and has optimized them for different scenarios:\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eDetail Model (Duplicate Key Model):\u003c/strong\u003e A detail data model designed to meet the detailed storage requirements of fact tables.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003ePrimary Key Model (Unique Key Model):\u003c/strong\u003e Ensures unique keys; data with the same key is overwritten, enabling row-level data updates.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eAggregate Model (Aggregate Key Model):\u003c/strong\u003e Merges value columns with the same key, significantly improving performance through pre-aggregation.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp dir=\"auto\"\u003eApache Doris also supports strongly consistent single-table materialized views and asynchronously refreshed multi-table materialized views. Single-table materialized views are automatically refreshed and maintained by the system, requiring no manual intervention from users. Multi-table materialized views can be refreshed periodically using in-cluster scheduling or external scheduling tools, reducing the complexity of data modeling.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🔍 Query Engine\u003c/h3\u003e\u003ca id=\"user-content--query-engine\" class=\"anchor\" aria-label=\"Permalink: 🔍 Query Engine\" href=\"#-query-engine\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eApache Doris has an MPP-based query engine for parallel execution between and within nodes. It supports distributed shuffle join for large tables to better handle complicated queries.\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/40634d40891143c14cf2568388808d04ced8731b7e01f5feae5f21f079d2ab54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f315f633666356261326166392e706e67\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/40634d40891143c14cf2568388808d04ced8731b7e01f5feae5f21f079d2ab54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f315f633666356261326166392e706e67\" alt=\"Query Engine\" data-canonical-src=\"https://cdn.selectdb.com/static/What_is_Apache_Doris_1_c6f5ba2af9.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003eThe query engine of Apache Doris is fully vectorized, with all memory structures laid out in a columnar format. This can largely reduce virtual function calls, increase cache hit rates, and make efficient use of SIMD instructions. Apache Doris delivers a 5~10 times higher performance in wide table aggregation scenarios than non-vectorized engines.\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003e\u003ca target=\"_blank\" rel=\"noopener noreferrer nofollow\" href=\"https://camo.githubusercontent.com/3d1ce441a76d60e13c160f3d0a0baac352eed002d27f77dd7c719a32a903f177/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f325f323963663538636336622e706e67\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/3d1ce441a76d60e13c160f3d0a0baac352eed002d27f77dd7c719a32a903f177/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f325f323963663538636336622e706e67\" alt=\"Doris query engine\" data-canonical-src=\"https://cdn.selectdb.com/static/What_is_Apache_Doris_2_29cf58cc6b.png\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cbr\u003e\n\u003cp dir=\"auto\"\u003eApache Doris uses adaptive query execution technology to dynamically adjust the execution plan based on runtime statistics. For example, it can generate a runtime filter and push it to the probe side. Specifically, it pushes the filters to the lowest-level scan node on the probe side, which largely reduces the data amount to be processed and increases join performance. The runtime filter of Apache Doris supports In/Min/Max/Bloom Filter.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eApache Doris uses a Pipeline execution engine that breaks down queries into multiple sub-tasks for parallel execution, fully leveraging multi-core CPU capabilities. It simultaneously addresses the thread explosion problem by limiting the number of query threads. The Pipeline execution engine reduces data copying and sharing, optimizes sorting and aggregation operations, thereby significantly improving query efficiency and throughput.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIn terms of the optimizer, Apache Doris employs a combined optimization strategy of CBO (Cost-Based Optimizer), RBO (Rule-Based Optimizer), and HBO (History-Based Optimizer). RBO supports constant folding, subquery rewriting, predicate pushdown, and more. CBO supports join reordering and other optimizations. HBO recommends the optimal execution plan based on historical query information. These multiple optimization measures ensure that Doris can enumerate high-performance query plans across various types of queries.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🎆 Why choose Apache Doris?\u003c/h2\u003e\u003ca id=\"user-content--why-choose-apache-doris\" class=\"anchor\" aria-label=\"Permalink: 🎆 Why choose Apache Doris?\" href=\"#-why-choose-apache-doris\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🎯 \u003cstrong\u003eEasy to Use:\u003c/strong\u003e Two processes, no other dependencies; online cluster scaling, automatic replica recovery; compatible with MySQL protocol, and using standard SQL.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🚀 \u003cstrong\u003eHigh Performance:\u003c/strong\u003e Extremely fast performance for low-latency and high-throughput queries with columnar storage engine, modern MPP architecture, vectorized query engine, pre-aggregated materialized view and data index.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🖥️ \u003cstrong\u003eSingle Unified:\u003c/strong\u003e A single system can support real-time data serving, interactive data analysis and offline data processing scenarios.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e⚛️ \u003cstrong\u003eFederated Querying:\u003c/strong\u003e Supports federated querying of data lakes such as Hive, Iceberg, Hudi, and databases such as MySQL and Elasticsearch.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e⏩ \u003cstrong\u003eVarious Data Import Methods:\u003c/strong\u003e Supports batch import from HDFS/S3 and stream import from MySQL Binlog/Kafka; supports micro-batch writing through HTTP interface and real-time writing using Insert in JDBC.\u003c/p\u003e\n\u003c/li\u003e\n\u003cli\u003e\n\u003cp dir=\"auto\"\u003e🚙 \u003cstrong\u003eRich Ecology:\u003c/strong\u003e Spark uses Spark-Doris-Connector to read and write Doris; Flink-Doris-Connector enables Flink CDC to implement exactly-once data writing to Doris; DBT Doris Adapter is provided to transform data in Doris with DBT.\u003c/p\u003e\n\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🙌 Contributors\u003c/h2\u003e\u003ca id=\"user-content--contributors\" class=\"anchor\" aria-label=\"Permalink: 🙌 Contributors\" href=\"#-contributors\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eApache Doris has graduated from Apache incubator successfully and become a Top-Level Project in June 2022\u003c/strong\u003e.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eWe deeply appreciate 🔗\u003ca href=\"https://github.com/apache/doris/graphs/contributors\"\u003ecommunity contributors\u003c/a\u003e for their contribution to Apache Doris.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://github.com/apache/doris/graphs/contributors\"\u003e\u003cimg src=\"https://camo.githubusercontent.com/18f76635806131212940f4f2388bec17b9419d26d388a45d7bf3cc19dcf1a802/68747470733a2f2f636f6e747269622e726f636b732f696d6167653f7265706f3d6170616368652f646f726973\" alt=\"contrib graph\" data-canonical-src=\"https://contrib.rocks/image?repo=apache/doris\" style=\"max-width: 100%;\"\u003e\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e👨‍👩‍👧‍👦 Users\u003c/h2\u003e\u003ca id=\"user-content--users\" class=\"anchor\" aria-label=\"Permalink: 👨‍👩‍👧‍👦 Users\" href=\"#-users\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eApache Doris now has a wide user base in China and around the world, and as of today, \u003cstrong\u003eApache Doris is used in production environments in thousands of companies worldwide.\u003c/strong\u003e More than 80% of the top 50 Internet companies in China in terms of market capitalization or valuation have been using Apache Doris for a long time, including Baidu, Meituan, Xiaomi, Jingdong, Bytedance, Tencent, NetEase, Kwai, Sina, 360, Mihoyo, and Ke Holdings. It is also widely used in some traditional industries such as finance, energy, manufacturing, and telecommunications.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eThe users of Apache Doris: 🔗\u003ca href=\"https://doris.apache.org/users\" rel=\"nofollow\"\u003eUsers\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eAdd your company logo at Apache Doris Website: 🔗\u003ca href=\"https://github.com/apache/doris/discussions/27683\" data-hovercard-type=\"discussion\" data-hovercard-url=\"/apache/doris/discussions/27683/hovercard\"\u003eAdd Your Company\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e👣 Get Started\u003c/h2\u003e\u003ca id=\"user-content--get-started\" class=\"anchor\" aria-label=\"Permalink: 👣 Get Started\" href=\"#-get-started\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📚 Docs\u003c/h3\u003e\u003ca id=\"user-content--docs\" class=\"anchor\" aria-label=\"Permalink: 📚 Docs\" href=\"#-docs\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAll Documentation 🔗\u003ca href=\"https://doris.apache.org/docs/gettingStarted/what-is-apache-doris\" rel=\"nofollow\"\u003eDocs\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e⬇️ Download\u003c/h3\u003e\u003ca id=\"user-content-️-download\" class=\"anchor\" aria-label=\"Permalink: ⬇️ Download\" href=\"#️-download\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eAll release and binary version 🔗\u003ca href=\"https://doris.apache.org/download\" rel=\"nofollow\"\u003eDownload\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🗄️ Compile\u003c/h3\u003e\u003ca id=\"user-content-️-compile\" class=\"anchor\" aria-label=\"Permalink: 🗄️ Compile\" href=\"#️-compile\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSee how to compile 🔗\u003ca href=\"https://doris.apache.org/community/source-install/compilation-with-docker\" rel=\"nofollow\"\u003eCompilation\u003c/a\u003e)\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📮 Install\u003c/h3\u003e\u003ca id=\"user-content--install\" class=\"anchor\" aria-label=\"Permalink: 📮 Install\" href=\"#-install\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eSee how to install and deploy 🔗\u003ca href=\"https://doris.apache.org/docs/install/preparation/env-checking\" rel=\"nofollow\"\u003eInstallation and deployment\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🧩 Components\u003c/h2\u003e\u003ca id=\"user-content--components\" class=\"anchor\" aria-label=\"Permalink: 🧩 Components\" href=\"#-components\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📝 Doris Connector\u003c/h3\u003e\u003ca id=\"user-content--doris-connector\" class=\"anchor\" aria-label=\"Permalink: 📝 Doris Connector\" href=\"#-doris-connector\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eDoris provides support for Spark/Flink to read data stored in Doris through Connector, and also supports to write data to Doris through Connector.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e🔗\u003ca href=\"https://github.com/apache/doris-flink-connector\"\u003eapache/doris-flink-connector\u003c/a\u003e\u003c/p\u003e\n\u003cp dir=\"auto\"\u003e🔗\u003ca href=\"https://github.com/apache/doris-spark-connector\"\u003eapache/doris-spark-connector\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🌈 Community and Support\u003c/h2\u003e\u003ca id=\"user-content--community-and-support\" class=\"anchor\" aria-label=\"Permalink: 🌈 Community and Support\" href=\"#-community-and-support\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📤 Subscribe Mailing Lists\u003c/h3\u003e\u003ca id=\"user-content--subscribe-mailing-lists\" class=\"anchor\" aria-label=\"Permalink: 📤 Subscribe Mailing Lists\" href=\"#-subscribe-mailing-lists\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eMail List is the most recognized form of communication in Apache community. See how to 🔗\u003ca href=\"https://doris.apache.org/community/subscribe-mail-list\" rel=\"nofollow\"\u003eSubscribe Mailing Lists\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🙋 Report Issues or Submit Pull Request\u003c/h3\u003e\u003ca id=\"user-content--report-issues-or-submit-pull-request\" class=\"anchor\" aria-label=\"Permalink: 🙋 Report Issues or Submit Pull Request\" href=\"#-report-issues-or-submit-pull-request\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIf you meet any questions, feel free to file a 🔗\u003ca href=\"https://github.com/apache/doris/issues\"\u003eGitHub Issue\u003c/a\u003e or post it in 🔗\u003ca href=\"https://github.com/apache/doris/discussions\"\u003eGitHub Discussion\u003c/a\u003e and fix it by submitting a 🔗\u003ca href=\"https://github.com/apache/doris/pulls\"\u003ePull Request\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🍻 How to Contribute\u003c/h3\u003e\u003ca id=\"user-content--how-to-contribute\" class=\"anchor\" aria-label=\"Permalink: 🍻 How to Contribute\" href=\"#-how-to-contribute\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWe welcome your suggestions, comments (including criticisms), comments and contributions. See 🔗\u003ca href=\"https://doris.apache.org/community/how-to-contribute/\" rel=\"nofollow\"\u003eHow to Contribute\u003c/a\u003e and 🔗\u003ca href=\"https://doris.apache.org/community/how-to-contribute/pull-request/\" rel=\"nofollow\"\u003eCode Submission Guide\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e⌨️ Doris Improvement Proposals (DSIP)\u003c/h3\u003e\u003ca id=\"user-content-️-doris-improvement-proposals-dsip\" class=\"anchor\" aria-label=\"Permalink: ⌨️ Doris Improvement Proposals (DSIP)\" href=\"#️-doris-improvement-proposals-dsip\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e🔗\u003ca href=\"https://cwiki.apache.org/confluence/display/DORIS/Doris+Improvement+Proposals\" rel=\"nofollow\"\u003eDoris Improvement Proposal (DSIP)\u003c/a\u003e can be thought of as \u003cstrong\u003eA Collection of Design Documents for all Major Feature Updates or Improvements\u003c/strong\u003e.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch3 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🔑 Backend C++ Coding Specification\u003c/h3\u003e\u003ca id=\"user-content--backend-c-coding-specification\" class=\"anchor\" aria-label=\"Permalink: 🔑 Backend C++ Coding Specification\" href=\"#-backend-c-coding-specification\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e🔗 \u003ca href=\"https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=240883637\" rel=\"nofollow\"\u003eBackend C++ Coding Specification\u003c/a\u003e should be strictly followed, which will help us achieve better code quality.\u003c/p\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e💬 Contact Us\u003c/h2\u003e\u003ca id=\"user-content--contact-us\" class=\"anchor\" aria-label=\"Permalink: 💬 Contact Us\" href=\"#-contact-us\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eContact us through the following mailing list.\u003c/p\u003e\n\u003cmarkdown-accessiblity-table\u003e\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eName\u003c/th\u003e\n\u003cth align=\"left\"\u003eScope\u003c/th\u003e\n\u003cth align=\"left\"\u003e\u003c/th\u003e\n\u003cth align=\"left\"\u003e\u003c/th\u003e\n\u003cth align=\"left\"\u003e\u003c/th\u003e\n\u003c/tr\u003e\n\u003c/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"mailto:dev@doris.apache.org\"\u003edev@doris.apache.org\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003eDevelopment-related discussions\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"mailto:dev-subscribe@doris.apache.org\"\u003eSubscribe\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"mailto:dev-unsubscribe@doris.apache.org\"\u003eUnsubscribe\u003c/a\u003e\u003c/td\u003e\n\u003ctd align=\"left\"\u003e\u003ca href=\"http://mail-archives.apache.org/mod_mbox/doris-dev/\" rel=\"nofollow\"\u003eArchives\u003c/a\u003e\u003c/td\u003e\n\u003c/tr\u003e\n\u003c/tbody\u003e\n\u003c/table\u003e\u003c/markdown-accessiblity-table\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e🧰 Links\u003c/h2\u003e\u003ca id=\"user-content--links\" class=\"anchor\" aria-label=\"Permalink: 🧰 Links\" href=\"#-links\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eApache Doris Official Website - \u003ca href=\"https://doris.apache.org\" rel=\"nofollow\"\u003eSite\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eDeveloper Mailing list - \u003ca href=\"mailto:dev@doris.apache.org\"\u003edev@doris.apache.org\u003c/a\u003e. Mail to \u003ca href=\"mailto:dev-subscribe@doris.apache.org\"\u003edev-subscribe@doris.apache.org\u003c/a\u003e, follow the reply to subscribe the mail list.\u003c/li\u003e\n\u003cli\u003eSlack channel - \u003ca href=\"https://join.slack.com/t/apachedoriscommunity/shared_invite/zt-2unfw3a3q-MtjGX4pAd8bCGC1UV0sKcw\" rel=\"nofollow\"\u003eJoin the Slack\u003c/a\u003e\u003c/li\u003e\n\u003cli\u003eTwitter - \u003ca href=\"https://twitter.com/doris_apache\" rel=\"nofollow\"\u003eFollow @doris_apache\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch2 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003e📜 License\u003c/h2\u003e\u003ca id=\"user-content--license\" class=\"anchor\" aria-label=\"Permalink: 📜 License\" href=\"#-license\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003e\u003ca href=\"https://www.apache.org/licenses/LICENSE-2.0\" rel=\"nofollow\"\u003eApache License, Version 2.0\u003c/a\u003e\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cstrong\u003eNote\u003c/strong\u003e\nSome licenses of the third-party dependencies are not compatible with Apache 2.0 License. So you need to disable\nsome Doris features to be complied with Apache 2.0 License. For details, refer to the \u003ccode\u003ethirdparty/LICENSE.txt\u003c/code\u003e\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003c/article\u003e","loaded":true,"timedOut":false,"errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Apache Doris","anchor":"apache-doris","htmlText":"Apache Doris"},{"level":2,"text":"📈 Usage Scenarios","anchor":"-usage-scenarios","htmlText":"📈 Usage Scenarios"},{"level":2,"text":"Overall Architecture","anchor":"overall-architecture","htmlText":"Overall Architecture"},{"level":3,"text":"Storage-Compute Integrated Architecture","anchor":"storage-compute-integrated-architecture","htmlText":"Storage-Compute Integrated Architecture"},{"level":2,"text":"Core Features of Apache Doris","anchor":"core-features-of-apache-doris","htmlText":"Core Features of Apache Doris"},{"level":2,"text":"Technical overview","anchor":"technical-overview","htmlText":"Technical overview"},{"level":3,"text":"Interface","anchor":"interface","htmlText":"Interface"},{"level":3,"text":"Storage engine","anchor":"storage-engine","htmlText":"Storage engine"},{"level":3,"text":"🔍 Query Engine","anchor":"-query-engine","htmlText":"🔍 Query Engine"},{"level":2,"text":"🎆 Why choose Apache Doris?","anchor":"-why-choose-apache-doris","htmlText":"🎆 Why choose Apache Doris?"},{"level":2,"text":"🙌 Contributors","anchor":"-contributors","htmlText":"🙌 Contributors"},{"level":2,"text":"👨‍👩‍👧‍👦 Users","anchor":"-users","htmlText":"👨‍👩‍👧‍👦 Users"},{"level":2,"text":"👣 Get Started","anchor":"-get-started","htmlText":"👣 Get Started"},{"level":3,"text":"📚 Docs","anchor":"-docs","htmlText":"📚 Docs"},{"level":3,"text":"⬇️ Download","anchor":"️-download","htmlText":"⬇️ Download"},{"level":3,"text":"🗄️ Compile","anchor":"️-compile","htmlText":"🗄️ Compile"},{"level":3,"text":"📮 Install","anchor":"-install","htmlText":"📮 Install"},{"level":2,"text":"🧩 Components","anchor":"-components","htmlText":"🧩 Components"},{"level":3,"text":"📝 Doris Connector","anchor":"-doris-connector","htmlText":"📝 Doris Connector"},{"level":2,"text":"🌈 Community and Support","anchor":"-community-and-support","htmlText":"🌈 Community and Support"},{"level":3,"text":"📤 Subscribe Mailing Lists","anchor":"-subscribe-mailing-lists","htmlText":"📤 Subscribe Mailing Lists"},{"level":3,"text":"🙋 Report Issues or Submit Pull Request","anchor":"-report-issues-or-submit-pull-request","htmlText":"🙋 Report Issues or Submit Pull Request"},{"level":3,"text":"🍻 How to Contribute","anchor":"-how-to-contribute","htmlText":"🍻 How to Contribute"},{"level":3,"text":"⌨️ Doris Improvement Proposals (DSIP)","anchor":"️-doris-improvement-proposals-dsip","htmlText":"⌨️ Doris Improvement Proposals (DSIP)"},{"level":3,"text":"🔑 Backend C++ Coding Specification","anchor":"-backend-c-coding-specification","htmlText":"🔑 Backend C++ Coding Specification"},{"level":2,"text":"💬 Contact Us","anchor":"-contact-us","htmlText":"💬 Contact Us"},{"level":2,"text":"🧰 Links","anchor":"-links","htmlText":"🧰 Links"},{"level":2,"text":"📜 License","anchor":"-license","htmlText":"📜 License"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fapache%2Fdoris"}},{"displayName":"CODE_OF_CONDUCT.md","repoName":"doris","refName":"master","path":"CODE_OF_CONDUCT.md","preferredFileType":"code_of_conduct","tabName":"Code of 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class="markdown-heading" dir="auto"><h1 tabindex="-1" class="heading-element" dir="auto">Apache Doris</h1><a id="user-content-apache-doris" class="anchor" aria-label="Permalink: Apache Doris" href="#apache-doris"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="https://www.apache.org/licenses/LICENSE-2.0.html" rel="nofollow"><img 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data-canonical-src="https://img.shields.io/badge/-Quick%20%20Download%20%E2%86%92-rgb(66,56,255)?style=for-the-badge" style="max-width: 100%;"></a></p> </div> <div dir="auto"> <a href="https://twitter.com/doris_apache" rel="nofollow"><img src="https://camo.githubusercontent.com/3b0ff497c669831531172ace21ee3c3768008ebfc183cbada4418f36f7fe1057/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d2040446f7269735f417061636865202d3432343534393f7374796c653d736f6369616c266c6f676f3d78" height="25" data-canonical-src="https://img.shields.io/badge/- @Doris_Apache -424549?style=social&logo=x" style="max-width: 100%;"></a> <a href="https://github.com/apache/doris/discussions"><img src="https://camo.githubusercontent.com/d40a8985823c792154de2b5a94bb02f2112f8a57539bd7857c9e60bf1eef9019/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d2044697363757373696f6e202d7265643f7374796c653d736f6369616c266c6f676f3d646973636f75727365" height="25" data-canonical-src="https://img.shields.io/badge/- Discussion -red?style=social&logo=discourse" style="max-width: 100%;"></a> <a href="https://join.slack.com/t/apachedoriscommunity/shared_invite/zt-2unfw3a3q-MtjGX4pAd8bCGC1UV0sKcw" height="25" rel="nofollow"></a> <a href="https://medium.com/@ApacheDoris" rel="nofollow"><img src="https://camo.githubusercontent.com/9abb917357a259c1eed8609b2dd611c7b7ff3e30a70014dc9f08058fb2fe2b24/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f2d4d656469756d2d7265643f7374796c653d736f6369616c266c6f676f3d6d656469756d" height="25" data-canonical-src="https://img.shields.io/badge/-Medium-red?style=social&logo=medium" style="max-width: 100%;"></a> </div> </div> <hr> <p dir="auto">Apache Doris is an easy-to-use, high-performance and real-time analytical database based on MPP architecture, known for its extreme speed and ease of use. It only requires a sub-second response time to return query results under massive data and can support not only high-concurrency point query scenarios but also high-throughput complex analysis scenarios.</p> <p dir="auto">All this makes Apache Doris an ideal tool for scenarios including report analysis, ad-hoc query, unified data warehouse, and data lake query acceleration. On Apache Doris, users can build various applications, such as user behavior analysis, AB test platform, log retrieval analysis, user portrait analysis, and order analysis.</p> <p dir="auto">🎉 Check out the 🔗<a href="https://doris.apache.org/docs/releasenotes/all-release" rel="nofollow">All releases</a>, where you'll find a chronological summary of Apache Doris versions released over the past year.</p> <p dir="auto">👀 Explore the 🔗<a href="https://doris.apache.org/" rel="nofollow">Official Website</a> to discover Apache Doris's core features, blogs, and user cases in detail.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">📈 Usage Scenarios</h2><a id="user-content--usage-scenarios" class="anchor" aria-label="Permalink: 📈 Usage Scenarios" href="#-usage-scenarios"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">As shown in the figure below, after various data integration and processing, the data sources are usually stored in the real-time data warehouse Apache Doris and the offline data lake or data warehouse (in Apache Hive, Apache Iceberg or Apache Hudi).</p> <br> <p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/bb6aea3e1f400280ffce293eb1f23ed852f8c918ef6c26ce6a7f08eaf185b35e/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f335f613631363932633263652e706e67"><img src="https://camo.githubusercontent.com/bb6aea3e1f400280ffce293eb1f23ed852f8c918ef6c26ce6a7f08eaf185b35e/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f335f613631363932633263652e706e67" data-canonical-src="https://cdn.selectdb.com/static/What_is_Apache_Doris_3_a61692c2ce.png" style="max-width: 100%;"></a></p> <br> <p dir="auto">Apache Doris is widely used in the following scenarios:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Real-time Data Analysis</strong>:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Real-time Reporting and Decision-making</strong>: Doris provides real-time updated reports and dashboards for both internal and external enterprise use, supporting real-time decision-making in automated processes.</p> </li> <li> <p dir="auto"><strong>Ad Hoc Analysis</strong>: Doris offers multidimensional data analysis capabilities, enabling rapid business intelligence analysis and ad hoc queries to help users quickly uncover insights from complex data.</p> </li> <li> <p dir="auto"><strong>User Profiling and Behavior Analysis</strong>: Doris can analyze user behaviors such as participation, retention, and conversion, while also supporting scenarios like population insights and crowd selection for behavior analysis.</p> </li> </ul> </li> <li> <p dir="auto"><strong>Lakehouse Analytics</strong>:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Lakehouse Query Acceleration</strong>: Doris accelerates lakehouse data queries with its efficient query engine.</p> </li> <li> <p dir="auto"><strong>Federated Analytics</strong>: Doris supports federated queries across multiple data sources, simplifying architecture and eliminating data silos.</p> </li> <li> <p dir="auto"><strong>Real-time Data Processing</strong>: Doris combines real-time data streams and batch data processing capabilities to meet the needs of high concurrency and low-latency complex business requirements.</p> </li> </ul> </li> <li> <p dir="auto"><strong>SQL-based Observability</strong>:</p> <ul dir="auto"> <li><strong>Log and Event Analysis</strong>: Doris enables real-time or batch analysis of logs and events in distributed systems, helping to identify issues and optimize performance.</li> </ul> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Overall Architecture</h2><a id="user-content-overall-architecture" class="anchor" aria-label="Permalink: Overall Architecture" href="#overall-architecture"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Apache Doris uses the MySQL protocol, is highly compatible with MySQL syntax, and supports standard SQL. Users can access Apache Doris through various client tools, and it seamlessly integrates with BI tools.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Storage-Compute Integrated Architecture</h3><a id="user-content-storage-compute-integrated-architecture" class="anchor" aria-label="Permalink: Storage-Compute Integrated Architecture" href="#storage-compute-integrated-architecture"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">The storage-compute integrated architecture of Apache Doris is streamlined and easy to maintain. As shown in the figure below, it consists of only two types of processes:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Frontend (FE):</strong> Primarily responsible for handling user requests, query parsing and planning, metadata management, and node management tasks.</p> </li> <li> <p dir="auto"><strong>Backend (BE):</strong> Primarily responsible for data storage and query execution. Data is partitioned into shards and stored with multiple replicas across BE nodes.</p> </li> </ul> <p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/ef5be2df6eb3d39e38131e840b17e2032b91ac5794b8ef62967916e1658a5f54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f616462323633393765322e706e67"><img src="https://camo.githubusercontent.com/ef5be2df6eb3d39e38131e840b17e2032b91ac5794b8ef62967916e1658a5f54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f616462323633393765322e706e67" alt="The overall architecture of Apache Doris" data-canonical-src="https://cdn.selectdb.com/static/What_is_Apache_Doris_adb26397e2.png" style="max-width: 100%;"></a></p> <br> <p dir="auto">In a production environment, multiple FE nodes can be deployed for disaster recovery. Each FE node maintains a full copy of the metadata. The FE nodes are divided into three roles:</p> <markdown-accessiblity-table><table> <thead> <tr> <th>Role</th> <th>Function</th> </tr> </thead> <tbody> <tr> <td>Master</td> <td>The FE Master node is responsible for metadata read and write operations. When metadata changes occur in the Master, they are synchronized to Follower or Observer nodes via the BDB JE protocol.</td> </tr> <tr> <td>Follower</td> <td>The Follower node is responsible for reading metadata. If the Master node fails, a Follower node can be selected as the new Master.</td> </tr> <tr> <td>Observer</td> <td>The Observer node is responsible for reading metadata and is mainly used to increase query concurrency. It does not participate in cluster leadership elections.</td> </tr> </tbody> </table></markdown-accessiblity-table> <p dir="auto">Both FE and BE processes are horizontally scalable, enabling a single cluster to support hundreds of machines and tens of petabytes of storage capacity. The FE and BE processes use a consistency protocol to ensure high availability of services and high reliability of data. The storage-compute integrated architecture is highly integrated, significantly reducing the operational complexity of distributed systems.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Core Features of Apache Doris</h2><a id="user-content-core-features-of-apache-doris" class="anchor" aria-label="Permalink: Core Features of Apache Doris" href="#core-features-of-apache-doris"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li> <p dir="auto"><strong>High Availability</strong>: In Apache Doris, both metadata and data are stored with multiple replicas, synchronizing data logs via the quorum protocol. Data write is considered successful once a majority of replicas have completed the write, ensuring that the cluster remains available even if a few nodes fail. Apache Doris supports both same-city and cross-region disaster recovery, enabling dual-cluster master-slave modes. When some nodes experience failures, the cluster can automatically isolate the faulty nodes, preventing the overall cluster availability from being affected.</p> </li> <li> <p dir="auto"><strong>High Compatibility</strong>: Apache Doris is highly compatible with the MySQL protocol and supports standard SQL syntax, covering most MySQL and Hive functions. This high compatibility allows users to seamlessly migrate and integrate existing applications and tools. Apache Doris supports the MySQL ecosystem, enabling users to connect Doris using MySQL Client tools for more convenient operations and maintenance. It also supports MySQL protocol compatibility for BI reporting tools and data transmission tools, ensuring efficiency and stability in data analysis and data transmission processes.</p> </li> <li> <p dir="auto"><strong>Real-Time Data Warehouse</strong>: Based on Apache Doris, a real-time data warehouse service can be built. Apache Doris offers second-level data ingestion capabilities, capturing incremental changes from upstream online transactional databases into Doris within seconds. Leveraging vectorized engines, MPP architecture, and Pipeline execution engines, Doris provides sub-second data query capabilities, thereby constructing a high-performance, low-latency real-time data warehouse platform.</p> </li> <li> <p dir="auto"><strong>Unified Lakehouse</strong>: Apache Doris can build a unified lakehouse architecture based on external data sources such as data lakes or relational databases. The Doris unified lakehouse solution enables seamless integration and free data flow between data lakes and data warehouses, helping users directly utilize data warehouse capabilities to solve data analysis problems in data lakes while fully leveraging data lake data management capabilities to enhance data value.</p> </li> <li> <p dir="auto"><strong>Flexible Modeling</strong>: Apache Doris offers various modeling approaches, such as wide table models, pre-aggregation models, star/snowflake schemas, etc. During data import, data can be flattened into wide tables and written into Doris through compute engines like Flink or Spark, or data can be directly imported into Doris, performing data modeling operations through views, materialized views, or real-time multi-table joins.</p> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">Technical overview</h2><a id="user-content-technical-overview" class="anchor" aria-label="Permalink: Technical overview" href="#technical-overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Doris provides an efficient SQL interface and is fully compatible with the MySQL protocol. Its query engine is based on an MPP (Massively Parallel Processing) architecture, capable of efficiently executing complex analytical queries and achieving low-latency real-time queries. Through columnar storage technology for data encoding and compression, it significantly optimizes query performance and storage compression ratio.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Interface</h3><a id="user-content-interface" class="anchor" aria-label="Permalink: Interface" href="#interface"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Apache Doris adopts the MySQL protocol, supports standard SQL, and is highly compatible with MySQL syntax. Users can access Apache Doris through various client tools and seamlessly integrate it with BI tools, including but not limited to Smartbi, DataEase, FineBI, Tableau, Power BI, and Apache Superset. Apache Doris can work as the data source for any BI tools that support the MySQL protocol.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">Storage engine</h3><a id="user-content-storage-engine" class="anchor" aria-label="Permalink: Storage engine" href="#storage-engine"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Apache Doris has a columnar storage engine, which encodes, compresses, and reads data by column. This enables a very high data compression ratio and largely reduces unnecessary data scanning, thus making more efficient use of IO and CPU resources.</p> <p dir="auto">Apache Doris supports various index structures to minimize data scans:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Sorted Compound Key Index</strong>: Users can specify three columns at most to form a compound sort key. This can effectively prune data to better support highly concurrent reporting scenarios.</p> </li> <li> <p dir="auto"><strong>Min/Max Index</strong>: This enables effective data filtering in equivalence and range queries of numeric types.</p> </li> <li> <p dir="auto"><strong>BloomFilter Index</strong>: This is very effective in equivalence filtering and pruning of high-cardinality columns.</p> </li> <li> <p dir="auto"><strong>Inverted Index</strong>: This enables fast searching for any field.</p> </li> </ul> <p dir="auto">Apache Doris supports a variety of data models and has optimized them for different scenarios:</p> <ul dir="auto"> <li> <p dir="auto"><strong>Detail Model (Duplicate Key Model):</strong> A detail data model designed to meet the detailed storage requirements of fact tables.</p> </li> <li> <p dir="auto"><strong>Primary Key Model (Unique Key Model):</strong> Ensures unique keys; data with the same key is overwritten, enabling row-level data updates.</p> </li> <li> <p dir="auto"><strong>Aggregate Model (Aggregate Key Model):</strong> Merges value columns with the same key, significantly improving performance through pre-aggregation.</p> </li> </ul> <p dir="auto">Apache Doris also supports strongly consistent single-table materialized views and asynchronously refreshed multi-table materialized views. Single-table materialized views are automatically refreshed and maintained by the system, requiring no manual intervention from users. Multi-table materialized views can be refreshed periodically using in-cluster scheduling or external scheduling tools, reducing the complexity of data modeling.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">🔍 Query Engine</h3><a id="user-content--query-engine" class="anchor" aria-label="Permalink: 🔍 Query Engine" href="#-query-engine"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Apache Doris has an MPP-based query engine for parallel execution between and within nodes. It supports distributed shuffle join for large tables to better handle complicated queries.</p> <br> <p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/40634d40891143c14cf2568388808d04ced8731b7e01f5feae5f21f079d2ab54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f315f633666356261326166392e706e67"><img src="https://camo.githubusercontent.com/40634d40891143c14cf2568388808d04ced8731b7e01f5feae5f21f079d2ab54/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f315f633666356261326166392e706e67" alt="Query Engine" data-canonical-src="https://cdn.selectdb.com/static/What_is_Apache_Doris_1_c6f5ba2af9.png" style="max-width: 100%;"></a></p> <br> <p dir="auto">The query engine of Apache Doris is fully vectorized, with all memory structures laid out in a columnar format. This can largely reduce virtual function calls, increase cache hit rates, and make efficient use of SIMD instructions. Apache Doris delivers a 5~10 times higher performance in wide table aggregation scenarios than non-vectorized engines.</p> <br> <p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/3d1ce441a76d60e13c160f3d0a0baac352eed002d27f77dd7c719a32a903f177/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f325f323963663538636336622e706e67"><img src="https://camo.githubusercontent.com/3d1ce441a76d60e13c160f3d0a0baac352eed002d27f77dd7c719a32a903f177/68747470733a2f2f63646e2e73656c65637464622e636f6d2f7374617469632f576861745f69735f4170616368655f446f7269735f325f323963663538636336622e706e67" alt="Doris query engine" data-canonical-src="https://cdn.selectdb.com/static/What_is_Apache_Doris_2_29cf58cc6b.png" style="max-width: 100%;"></a></p> <br> <p dir="auto">Apache Doris uses adaptive query execution technology to dynamically adjust the execution plan based on runtime statistics. For example, it can generate a runtime filter and push it to the probe side. Specifically, it pushes the filters to the lowest-level scan node on the probe side, which largely reduces the data amount to be processed and increases join performance. The runtime filter of Apache Doris supports In/Min/Max/Bloom Filter.</p> <p dir="auto">Apache Doris uses a Pipeline execution engine that breaks down queries into multiple sub-tasks for parallel execution, fully leveraging multi-core CPU capabilities. It simultaneously addresses the thread explosion problem by limiting the number of query threads. The Pipeline execution engine reduces data copying and sharing, optimizes sorting and aggregation operations, thereby significantly improving query efficiency and throughput.</p> <p dir="auto">In terms of the optimizer, Apache Doris employs a combined optimization strategy of CBO (Cost-Based Optimizer), RBO (Rule-Based Optimizer), and HBO (History-Based Optimizer). RBO supports constant folding, subquery rewriting, predicate pushdown, and more. CBO supports join reordering and other optimizations. HBO recommends the optimal execution plan based on historical query information. These multiple optimization measures ensure that Doris can enumerate high-performance query plans across various types of queries.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">🎆 Why choose Apache Doris?</h2><a id="user-content--why-choose-apache-doris" class="anchor" aria-label="Permalink: 🎆 Why choose Apache Doris?" href="#-why-choose-apache-doris"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li> <p dir="auto">🎯 <strong>Easy to Use:</strong> Two processes, no other dependencies; online cluster scaling, automatic replica recovery; compatible with MySQL protocol, and using standard SQL.</p> </li> <li> <p dir="auto">🚀 <strong>High Performance:</strong> Extremely fast performance for low-latency and high-throughput queries with columnar storage engine, modern MPP architecture, vectorized query engine, pre-aggregated materialized view and data index.</p> </li> <li> <p dir="auto">🖥️ <strong>Single Unified:</strong> A single system can support real-time data serving, interactive data analysis and offline data processing scenarios.</p> </li> <li> <p dir="auto">⚛️ <strong>Federated Querying:</strong> Supports federated querying of data lakes such as Hive, Iceberg, Hudi, and databases such as MySQL and Elasticsearch.</p> </li> <li> <p dir="auto">⏩ <strong>Various Data Import Methods:</strong> Supports batch import from HDFS/S3 and stream import from MySQL Binlog/Kafka; supports micro-batch writing through HTTP interface and real-time writing using Insert in JDBC.</p> </li> <li> <p dir="auto">🚙 <strong>Rich Ecology:</strong> Spark uses Spark-Doris-Connector to read and write Doris; Flink-Doris-Connector enables Flink CDC to implement exactly-once data writing to Doris; DBT Doris Adapter is provided to transform data in Doris with DBT.</p> </li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">🙌 Contributors</h2><a id="user-content--contributors" class="anchor" aria-label="Permalink: 🙌 Contributors" href="#-contributors"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><strong>Apache Doris has graduated from Apache incubator successfully and become a Top-Level Project in June 2022</strong>.</p> <p dir="auto">We deeply appreciate 🔗<a href="https://github.com/apache/doris/graphs/contributors">community contributors</a> for their contribution to Apache Doris.</p> <p dir="auto"><a href="https://github.com/apache/doris/graphs/contributors"><img src="https://camo.githubusercontent.com/18f76635806131212940f4f2388bec17b9419d26d388a45d7bf3cc19dcf1a802/68747470733a2f2f636f6e747269622e726f636b732f696d6167653f7265706f3d6170616368652f646f726973" alt="contrib graph" data-canonical-src="https://contrib.rocks/image?repo=apache/doris" style="max-width: 100%;"></a></p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">👨‍👩‍👧‍👦 Users</h2><a id="user-content--users" class="anchor" aria-label="Permalink: 👨‍👩‍👧‍👦 Users" href="#-users"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Apache Doris now has a wide user base in China and around the world, and as of today, <strong>Apache Doris is used in production environments in thousands of companies worldwide.</strong> More than 80% of the top 50 Internet companies in China in terms of market capitalization or valuation have been using Apache Doris for a long time, including Baidu, Meituan, Xiaomi, Jingdong, Bytedance, Tencent, NetEase, Kwai, Sina, 360, Mihoyo, and Ke Holdings. It is also widely used in some traditional industries such as finance, energy, manufacturing, and telecommunications.</p> <p dir="auto">The users of Apache Doris: 🔗<a href="https://doris.apache.org/users" rel="nofollow">Users</a></p> <p dir="auto">Add your company logo at Apache Doris Website: 🔗<a href="https://github.com/apache/doris/discussions/27683" data-hovercard-type="discussion" data-hovercard-url="/apache/doris/discussions/27683/hovercard">Add Your Company</a></p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">👣 Get Started</h2><a id="user-content--get-started" class="anchor" aria-label="Permalink: 👣 Get Started" href="#-get-started"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">📚 Docs</h3><a id="user-content--docs" class="anchor" aria-label="Permalink: 📚 Docs" href="#-docs"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">All Documentation 🔗<a href="https://doris.apache.org/docs/gettingStarted/what-is-apache-doris" rel="nofollow">Docs</a></p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">⬇️ Download</h3><a id="user-content-️-download" class="anchor" aria-label="Permalink: ⬇️ Download" href="#️-download"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">All release and binary version 🔗<a href="https://doris.apache.org/download" rel="nofollow">Download</a></p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">🗄️ Compile</h3><a id="user-content-️-compile" class="anchor" aria-label="Permalink: 🗄️ Compile" href="#️-compile"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">See how to compile 🔗<a href="https://doris.apache.org/community/source-install/compilation-with-docker" rel="nofollow">Compilation</a>)</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">📮 Install</h3><a id="user-content--install" class="anchor" aria-label="Permalink: 📮 Install" href="#-install"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">See how to install and deploy 🔗<a href="https://doris.apache.org/docs/install/preparation/env-checking" rel="nofollow">Installation and deployment</a></p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">🧩 Components</h2><a id="user-content--components" class="anchor" aria-label="Permalink: 🧩 Components" href="#-components"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">📝 Doris Connector</h3><a id="user-content--doris-connector" class="anchor" aria-label="Permalink: 📝 Doris Connector" href="#-doris-connector"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Doris provides support for Spark/Flink to read data stored in Doris through Connector, and also supports to write data to Doris through Connector.</p> <p dir="auto">🔗<a href="https://github.com/apache/doris-flink-connector">apache/doris-flink-connector</a></p> <p dir="auto">🔗<a href="https://github.com/apache/doris-spark-connector">apache/doris-spark-connector</a></p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">🌈 Community and Support</h2><a id="user-content--community-and-support" class="anchor" aria-label="Permalink: 🌈 Community and Support" href="#-community-and-support"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">📤 Subscribe Mailing Lists</h3><a id="user-content--subscribe-mailing-lists" class="anchor" aria-label="Permalink: 📤 Subscribe Mailing Lists" href="#-subscribe-mailing-lists"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Mail List is the most recognized form of communication in Apache community. See how to 🔗<a href="https://doris.apache.org/community/subscribe-mail-list" rel="nofollow">Subscribe Mailing Lists</a></p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">🙋 Report Issues or Submit Pull Request</h3><a id="user-content--report-issues-or-submit-pull-request" class="anchor" aria-label="Permalink: 🙋 Report Issues or Submit Pull Request" href="#-report-issues-or-submit-pull-request"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">If you meet any questions, feel free to file a 🔗<a href="https://github.com/apache/doris/issues">GitHub Issue</a> or post it in 🔗<a href="https://github.com/apache/doris/discussions">GitHub Discussion</a> and fix it by submitting a 🔗<a href="https://github.com/apache/doris/pulls">Pull Request</a></p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">🍻 How to Contribute</h3><a id="user-content--how-to-contribute" class="anchor" aria-label="Permalink: 🍻 How to Contribute" href="#-how-to-contribute"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">We welcome your suggestions, comments (including criticisms), comments and contributions. See 🔗<a href="https://doris.apache.org/community/how-to-contribute/" rel="nofollow">How to Contribute</a> and 🔗<a href="https://doris.apache.org/community/how-to-contribute/pull-request/" rel="nofollow">Code Submission Guide</a></p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">⌨️ Doris Improvement Proposals (DSIP)</h3><a id="user-content-️-doris-improvement-proposals-dsip" class="anchor" aria-label="Permalink: ⌨️ Doris Improvement Proposals (DSIP)" href="#️-doris-improvement-proposals-dsip"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">🔗<a href="https://cwiki.apache.org/confluence/display/DORIS/Doris+Improvement+Proposals" rel="nofollow">Doris Improvement Proposal (DSIP)</a> can be thought of as <strong>A Collection of Design Documents for all Major Feature Updates or Improvements</strong>.</p> <div class="markdown-heading" dir="auto"><h3 tabindex="-1" class="heading-element" dir="auto">🔑 Backend C++ Coding Specification</h3><a id="user-content--backend-c-coding-specification" class="anchor" aria-label="Permalink: 🔑 Backend C++ Coding Specification" href="#-backend-c-coding-specification"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">🔗 <a href="https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=240883637" rel="nofollow">Backend C++ Coding Specification</a> should be strictly followed, which will help us achieve better code quality.</p> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">💬 Contact Us</h2><a id="user-content--contact-us" class="anchor" aria-label="Permalink: 💬 Contact Us" href="#-contact-us"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto">Contact us through the following mailing list.</p> <markdown-accessiblity-table><table> <thead> <tr> <th align="left">Name</th> <th align="left">Scope</th> <th align="left"></th> <th align="left"></th> <th align="left"></th> </tr> </thead> <tbody> <tr> <td align="left"><a href="mailto:dev@doris.apache.org">dev@doris.apache.org</a></td> <td align="left">Development-related discussions</td> <td align="left"><a 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0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <ul dir="auto"> <li>Apache Doris Official Website - <a href="https://doris.apache.org" rel="nofollow">Site</a></li> <li>Developer Mailing list - <a href="mailto:dev@doris.apache.org">dev@doris.apache.org</a>. Mail to <a href="mailto:dev-subscribe@doris.apache.org">dev-subscribe@doris.apache.org</a>, follow the reply to subscribe the mail list.</li> <li>Slack channel - <a href="https://join.slack.com/t/apachedoriscommunity/shared_invite/zt-2unfw3a3q-MtjGX4pAd8bCGC1UV0sKcw" rel="nofollow">Join the Slack</a></li> <li>Twitter - <a href="https://twitter.com/doris_apache" rel="nofollow">Follow @doris_apache</a></li> </ul> <div class="markdown-heading" dir="auto"><h2 tabindex="-1" class="heading-element" dir="auto">📜 License</h2><a id="user-content--license" class="anchor" aria-label="Permalink: 📜 License" href="#-license"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path></svg></a></div> <p dir="auto"><a href="https://www.apache.org/licenses/LICENSE-2.0" rel="nofollow">Apache License, Version 2.0</a></p> <blockquote> <p dir="auto"><strong>Note</strong> Some licenses of the third-party dependencies are not compatible with Apache 2.0 License. So you need to disable some Doris features to be complied with Apache 2.0 License. For details, refer to the <code>thirdparty/LICENSE.txt</code></p> </blockquote> </article></div></div></div></div></div>   <script type="application/json" id="__PRIMER_DATA_:R0:__">{"resolvedServerColorMode":"day"}</script></div> </react-partial> <input type="hidden" data-csrf="true" value="vPXVNEpp8z05SqMdazi65Nd97Xw+fgCVZx7L3aw3sfLdRI6SI2r3tKLJTx7L3AwOKwtD5SC7WAsO70hAhIx+aQ==" /> </div> <div data-view-component="true" class="Layout-sidebar"> <div class="BorderGrid about-margin" data-pjax> <div class="BorderGrid-row"> <div class="BorderGrid-cell"> <div class="hide-sm hide-md"> <h2 class="mb-3 h4">About</h2> <p class="f4 my-3"> Apache Doris is an easy-to-use, high performance and unified analytics database. </p> <div class="my-3 d-flex flex-items-center"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link flex-shrink-0 mr-2"> <path d="m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z"></path> </svg> <span class="flex-auto min-width-0 css-truncate css-truncate-target width-fit"> <a title="https://doris.apache.org" role="link" target="_blank" rel="noopener noreferrer nofollow" class="text-bold" href="https://doris.apache.org">doris.apache.org</a> </span> </div> <h3 class="sr-only">Topics</h3> <div class="my-3"> <div class="f6"> <a href="/topics/bigquery" title="Topic: bigquery" data-view-component="true" class="topic-tag topic-tag-link"> bigquery </a> <a href="/topics/real-time" title="Topic: real-time" data-view-component="true" class="topic-tag topic-tag-link"> real-time </a> <a href="/topics/sql" title="Topic: sql" data-view-component="true" class="topic-tag topic-tag-link"> sql </a> <a href="/topics/database" title="Topic: database" data-view-component="true" class="topic-tag topic-tag-link"> database </a> <a href="/topics/spark" title="Topic: spark" data-view-component="true" class="topic-tag topic-tag-link"> spark </a> <a href="/topics/hive" title="Topic: hive" data-view-component="true" class="topic-tag topic-tag-link"> hive </a> <a href="/topics/hadoop" title="Topic: hadoop" data-view-component="true" class="topic-tag topic-tag-link"> hadoop </a> <a href="/topics/etl" title="Topic: etl" data-view-component="true" class="topic-tag topic-tag-link"> etl </a> <a href="/topics/snowflake" title="Topic: snowflake" data-view-component="true" class="topic-tag topic-tag-link"> snowflake </a> <a href="/topics/olap" title="Topic: olap" data-view-component="true" class="topic-tag topic-tag-link"> olap </a> <a href="/topics/query-engine" title="Topic: query-engine" data-view-component="true" class="topic-tag topic-tag-link"> query-engine </a> <a href="/topics/redshift" title="Topic: redshift" data-view-component="true" class="topic-tag topic-tag-link"> redshift </a> <a href="/topics/dbt" title="Topic: dbt" data-view-component="true" class="topic-tag topic-tag-link"> dbt </a> <a href="/topics/elt" title="Topic: elt" data-view-component="true" class="topic-tag topic-tag-link"> elt </a> <a href="/topics/iceberg" title="Topic: iceberg" data-view-component="true" class="topic-tag topic-tag-link"> iceberg </a> <a href="/topics/hudi" title="Topic: hudi" data-view-component="true" class="topic-tag topic-tag-link"> hudi </a> <a href="/topics/delta-lake" title="Topic: delta-lake" data-view-component="true" class="topic-tag topic-tag-link"> delta-lake </a> <a href="/topics/lakehouse" title="Topic: lakehouse" data-view-component="true" class="topic-tag topic-tag-link"> lakehouse </a> </div> </div> <h3 class="sr-only">Resources</h3> <div class="mt-2"> <a class="Link--muted" data-analytics-event="{"category":"Repository Overview","action":"click","label":"location:sidebar;file:readme"}" href="#readme-ov-file"> <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-book mr-2"> <path d="M0 1.75A.75.75 0 0 1 .75 1h4.253c1.227 0 2.317.59 3 1.501A3.743 3.743 0 0 1 11.006 1h4.245a.75.75 0 0 1 .75.75v10.5a.75.75 0 0 1-.75.75h-4.507a2.25 2.25 0 0 0-1.591.659l-.622.621a.75.75 0 0 1-1.06 0l-.622-.621A2.25 2.25 0 0 0 5.258 13H.75a.75.75 0 0 1-.75-.75Zm7.251 10.324.004-5.073-.002-2.253A2.25 2.25 0 0 0 5.003 2.5H1.5v9h3.757a3.75 3.75 0 0 1 1.994.574ZM8.755 4.75l-.004 7.322a3.752 3.752 0 0 1 1.992-.572H14.5v-9h-3.495a2.25 2.25 0 0 0-2.25 2.25Z"></path> </svg> Readme </a> </div> <h3 class="sr-only">License</h3> <div class="mt-2"> <a href="#Apache-2.0-1-ov-file" class="Link--muted" 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