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href="https://cloud.tencent.com/act/pro/promotion?from=21746" class="tp-link tpm-link tp-link--white-arrow"><span class="tp-link__inner">立即抢购</span></a></div></nav><div><div><div class="tpm-prod-hero__header"><h1 class="tpm-prod-hero__tit" id="hero_tit"><span>云硬盘 CBS</span></h1><button hotrep="product.cbs.banner.video_title" class="tpm-prod-hero__video-btn"><i class="tpm-prod-hero__video-btn-icon"></i><span class="tpm-prod-hero__video-btn-text">观看视频</span></button></div><p class="tpm-prod-hero__desc">云硬盘（Cloud Block Storage，CBS）为您提供用于 CVM 的持久性数据块级存储服务。云硬盘中的数据自动地在可用区内以多副本冗余方式存储，避免数据的单点故障风险，提供高达99.9999999%的数据可靠性。同时提供多种类型及规格，满足稳定低延迟的存储性能要求。</p></div></div><div class="tpm-prod-hero__btn-group"><div class="tpm-prod-hero__btn-group--primary"><a class="tpm-btn tpm-prod-hero__btn tpm-btn--primary" href="https://console.cloud.tencent.com/cvm/cbs" hotrep="product.cbs.banner.btn1"><span class="tpm-btn__text">立即选购</span></a><a class="tpm-btn tpm-prod-hero__btn tpm-btn--primary 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class="with-gap"><header class="tpm-section__hd" style="padding-top:60px" id="t2E1KbBeRz" data-id="t2E1KbBeRz"><h2 class="tl-anchor tpm-section__title">产品特性</h2></header><div class="view-column"><div><div class="tp-grid__layout"><div><div class="tp-grid__row tp-grid--gutter-8n"><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><div class="tpm-feature__item"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/F5d0UIIRhgWzGzWzDwFJf.png" alt="" class="tpm-feature__item-icon"/><div class="tpm-feature__item-bd"><h3 class="tpm-feature__item-title">弹性可扩展</h3><div class="tpm-feature__item-desc">单磁盘容量最大支持32TB，单个 CVM 累计可挂载640TB，您可以自由配置存储容量，按需扩容，以满足您的业务数据扩容需求，灵活应对 TB/PB 级数据的大数据处理场景。 </div></div></div></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><div class="tpm-feature__item"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/qaagxLeAKs31tIiylVbnH.png" alt="" class="tpm-feature__item-icon"/><div class="tpm-feature__item-bd"><h3 class="tpm-feature__item-title">多存储类型</h3><div class="tpm-feature__item-desc">提供高性能云硬盘、通用型 SSD 云硬盘、SSD 云硬盘、增强型 SSD 云硬盘和极速型 SSD 云硬盘五种 CBS 卷类型。可支持高达 1000000 随机 IOPS、4000MB/s 的吞吐能力及稳定低延迟，助您轻松部署 I/O 密集型业务。</div></div></div></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><div class="tpm-feature__item"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/dRQLAYeIwxnKGH9t_fjLE.png" alt="" class="tpm-feature__item-icon"/><div class="tpm-feature__item-bd"><h3 class="tpm-feature__item-title">稳定可靠</h3><div class="tpm-feature__item-desc">CBS 提供高达99.9999999%的数据可靠性以保护您的应用程序免受组件故障的威胁。</div></div></div></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><div class="tpm-feature__item"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/F0E8XtBLzoJO_5QCtVFNA.png" alt="" class="tpm-feature__item-icon"/><div class="tpm-feature__item-bd"><h3 class="tpm-feature__item-title">简单易用</h3><div class="tpm-feature__item-desc">通过简单的创建、挂载、卸载、删除等操作即可管理及使用云硬盘，节省人工管理部署成本。</div></div></div></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><div class="tpm-feature__item"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/MUKPZoQqbjDtoFNnxebP6.png" alt="" class="tpm-feature__item-icon"/><div class="tpm-feature__item-bd"><h3 class="tpm-feature__item-title">快照备份</h3><div class="tpm-feature__item-desc">您可以通过拍摄 CBS 云硬盘的时间点快照来备份您的数据，防止因篡改和误删导致的数据丢失，保证在业务故障时能够快速回退。</div></div></div></div></div></div></div></div></div></div><div class="tl-scene-frameworks-vertical with-gap bg-gray" id="aKDLc2cRu" data-id="aKDLc2cRu"><header class="tpm-section__hd" style="padding-top:60px" id="eoiNly09VO" data-id="eoiNly09VO"><h2 class="tl-anchor tpm-section__title">应用场景</h2></header><div class="tl-tabs"><div class="view-column"><div class="tl-tabs__bar"><ul class="tl-tabs__list"><li class="tl-tabs__item is-active"><div class="tl-tabs__item-cont is-active">企业办公应用</div></li><li class="tl-tabs__item"><div class="tl-tabs__item-cont">关系型数据库/NoSQL 数据库</div></li><li class="tl-tabs__item"><div class="tl-tabs__item-cont">海量数据分析</div></li></ul></div></div><div class="tl-tabs__cont" style="padding-left:0;padding-right:0"><div class="tl-tabs__panel" style="transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"><div class="tl-framework tpm-media-section"><div class="view-column"><div class="tpm-draft tpm-media-section__content"><div class="tpm-rich-text"><p class="ts-p">传统存储的硬件故障会导致业务中断数十小时。CBS 高效支持云服务器热迁移，提前避免物理故障造成业务中断。CBS 具备完善的数据备份、快照、数据恢复能力；适用于高负载、核心关键业务系统，满足企业弹性可靠的大容量块存储办公需求。</p></div></div><div class="tp-grid__row tpm-media standalone"><div class="tp-grid__col tpm-media__object"><img style="max-width:100%" src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/QD7ucJwgRuUuwIaKBgrhz.svg"/></div></div></div></div></div><div class="tl-tabs__panel" style="height:0;width:0;overflow:hidden;opacity:0;padding:0;margin:0;pointer-events:none;display:block;transform:translate3d(0, 10px, 0);transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"></div><div class="tl-tabs__panel" style="height:0;width:0;overflow:hidden;opacity:0;padding:0;margin:0;pointer-events:none;display:block;transform:translate3d(0, 10px, 0);transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"></div></div></div></div><div class="tpm-case3 with-gap" id="n6MBD6OJD" data-id="n6MBD6OJD"><div class="tpm-case3__section"><div class="tpm-case3__section-bg" style="background-image:url(https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/f1eNXtHbT2ZJlAyxJs1BE.png)"></div><div class="tpm-case3__section-main"><h2 class="tl-anchor tpm-case3__title">客户案例</h2><p class="tpm-case3__desc">腾讯云云硬盘 CBS 是这些行业标杆客户的第一选择，欢迎使用腾讯云。</p><div class="tl-swiper tpm-case-card__list"><div class="swiper-container"><div class="swiper-button-prev"></div><div class="swiper-button-next"></div><div class="swiper-pagination"></div><div class="swiper-wrapper"><div class="swiper-slide"><a class="tpm-case-card tpm-case-card--vertical" href="https://cloud.tencent.com/customer/xiaohongshu"><div class="tpm-case-card__bg"></div><div class="tpm-case-card__inner"><div class="tpm-case-card__object"><img src="https://qcloudimg.tencent-cloud.cn/trisys/assets/product/images/VUaLpSGOMTOdIJ0fR3vKC.png" alt="" class="tpm-case-card__logo"/></div><div class="tpm-case-card__main"><h4 class="tpm-case-card__title"> 小红书</h4><div class="tpm-case-card__desc">腾讯云支持以不同业务需求按需购买，助力小红书节省成本、提高效率，永远走在竞争对手前面。</div></div></div></a></div><div class="swiper-slide"><a class="tpm-case-card tpm-case-card--vertical" href="https://cloud.tencent.com/customer/ftzq"><div 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class="tpm-doc"><div class="tp-grid__row tpm-doc__list"><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362" class="tpm-doc__item"><h3 class="tpm-doc__item-title">CBS 产品文档总览</h3><div class="tpm-doc__item-desc">提供 CBS 产品简介、购买指南、快速入门等文档指引，方便用户进一步了解和使用 CBS。</div></a></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362/2356" class="tpm-doc__item"><h3 class="tpm-doc__item-title">购买指南</h3><div class="tpm-doc__item-desc">提供 CBS 的计费概述、价格总览、退费/欠费说明等文档指引。</div></a></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362/32401" class="tpm-doc__item"><h3 class="tpm-doc__item-title">快速入门</h3><div class="tpm-doc__item-desc">提供 CBS 的创建、挂载、初始化等文档指引。</div></a></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362/32432" class="tpm-doc__item"><h3 class="tpm-doc__item-title">操作指南</h3><div class="tpm-doc__item-desc">提供管理云硬盘、管理快照以及监控与告警等云硬盘的常用操作指引。</div></a></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362/6741" class="tpm-doc__item"><h3 class="tpm-doc__item-title">最佳实践</h3><div class="tpm-doc__item-desc">提供衡量云硬盘的性能、多块弹性云硬盘构建 RAID 组等典型场景操作指引。</div></a></div><div class="tp-grid__col tp-grid__col--8 tp-grid__col--pad-12 tp-grid__col--phone-24"><a href="https://cloud.tencent.com/document/product/362/15634" class="tpm-doc__item"><h3 class="tpm-doc__item-title">API 文档</h3><div class="tpm-doc__item-desc">提供 CBS 各 API 接口的功能、参数、使用方法和数据结构等说明</div></a></div></div></div></div></div><div id="SfIVqSf8_" data-id="SfIVqSf8_" class="tl-faqs with-gap bg-gray"><header class="tpm-section__hd" style="padding-top:60px" id="G-VjGIlR7O" data-id="G-VjGIlR7O"><h2 class="tl-anchor tpm-section__title">常见问题</h2></header><div style="margin-bottom:40px"><div class="tl-tabs tl-tabs--blank"><div class="view-column"><div class="tl-tabs__bar"><ul class="tl-tabs__list"><li class="tl-tabs__item is-active"><div class="tl-tabs__item-cont is-active">一般常见问题</div></li><li class="tl-tabs__item"><div class="tl-tabs__item-cont">云硬盘使用和生命周期问题</div></li><li class="tl-tabs__item"><div class="tl-tabs__item-cont">快照常见问题</div></li><li class="tl-tabs__item"><div class="tl-tabs__item-cont">硬盘性能常见问题</div></li></ul></div></div><div class="tl-tabs__cont"><div class="tl-tabs__panel" style="transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"><div class="tl-faq-list tpm-faq__list"><div class="view-column"><div class="tpm-faq__item is-open"><div class="tpm-faq__item-hd"><h3 class="tpm-faq__item-title">什么是云硬盘 CBS？</h3><i class="tpm-faq__item-icon"></i></div><div class="tpm-faq__item-bd"><div class="tpm-rich-text"><p class="ts-p">云硬盘（Cloud Block Storage，CBS）为云服务器实例提供高效可靠的存储设备，它是一种高可用、高可靠、低成本、可定制化的块存储设备，可以作为云服务器的独立可扩展硬盘使用。它提供数据块级别的数据存储，采用三副本的分布式机制，为 CVM 提供数据可靠性保证。</p></div></div></div><div class="tpm-faq__item"><div class="tpm-faq__item-hd"><h3 class="tpm-faq__item-title">当 CVM 销毁时，数据会发生什么情况？</h3><i class="tpm-faq__item-icon"></i></div></div><div class="tpm-faq__item"><div class="tpm-faq__item-hd"><h3 class="tpm-faq__item-title">CBS 不同类型之间有什么区别？</h3><i class="tpm-faq__item-icon"></i></div></div><div class="tpm-faq__item"><div class="tpm-faq__item-hd"><h3 class="tpm-faq__item-title">我应该选择哪种 CBS 类型？</h3><i class="tpm-faq__item-icon"></i></div></div><div class="tpm-faq__item"><div class="tpm-faq__item-hd"><h3 class="tpm-faq__item-title">在成功购买后，是否能更换云硬盘的类型？</h3><i class="tpm-faq__item-icon"></i></div></div></div></div></div><div class="tl-tabs__panel" style="height:0;width:0;overflow:hidden;opacity:0;padding:0;margin:0;pointer-events:none;display:block;transform:translate3d(0, 10px, 0);transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"></div><div class="tl-tabs__panel" style="height:0;width:0;overflow:hidden;opacity:0;padding:0;margin:0;pointer-events:none;display:block;transform:translate3d(0, 10px, 0);transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"></div><div class="tl-tabs__panel" style="height:0;width:0;overflow:hidden;opacity:0;padding:0;margin:0;pointer-events:none;display:block;transform:translate3d(0, 10px, 0);transition:opacity .45s ease, transform .45s ease;transform-origin:center;flex-shrink:0"></div></div></div></div><div style="margin-top:40px;padding-bottom:60px" id="OavXcY4qU2" data-id="OavXcY4qU2"><div class="view-column" style="text-align:center"><div class="tpm-rich-text"><p class="ts-p">更多问题请查看 <a class="ts-link" href="https://cloud.tencent.com/document/product/362/17818">常见问题</a>，也可在 <a class="ts-link" href="https://cloud.tencent.com/developer/ask">问答社区</a> 中进行提问。</p></div></div></div></div><div class="tl-call2action" id="xhTpDt9FO" data-id="xhTpDt9FO"><div class="tpm-2-action-panel"><div class="tpm-2-action-panel__inner"><main class="tpm-2-action-panel__main"><div class="tpm-2-action-panel__desc">按照我们的入门指南，只需点几次鼠标，即可创建您的首个腾讯云云硬盘。</div><div class="tpm-2-action-panel__btns"><a class="tpm-btn tpm-btn--white-hole" href="https://console.cloud.tencent.com/cvm/cbs"><span class="tpm-btn__text">开始使用</span></a></div></main><aside class="tpm-2-action-panel__side"></aside></div></div></div></div></div> </div> <script> window.__QCPortalContext__ = { version: "0.5.0", resource: {}, $getCurrServerTime: (function(s, c) {return function(){return +new Date()+s-c;}})(1739801878304, +new Date()), } </script> <script src="https://cloudcache.tencent-cloud.com/qcloud/portal/kit/full.a51636fb1.js"></script> <script> if (window.QCPortalKit) { 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来存储需要保存较长时间的数据。"}]}],"id":"1efc9813-28ae-4075-9c90-7df66f0c363a"}]},"__vid__":"vMWz1G3xWJofpfkky7ASP"},{"question":"CBS 不同类型之间有什么区别？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"云硬盘 CBS 提供最新一代的五种卷类型：适用于 Web 服务器和各种小型负载等大部分 IO 场景的高性能云硬盘、适用于通用型场景的入门级全闪存储类型通用型 SSD 云硬盘，适用于中型数据库等业务场景的 SSD 云硬盘和适用于大型关系型数据库，密集型 NoSQL，日志检索，视频处理、直播等业务的增强型 SSD 云硬盘和极速型 SSD 云硬盘。这些卷类型的性能特点和价格各不相同，您可根据应用程序要求选择您所需的存储性能和相应费用。"}]}],"id":"2adcf651-5d57-49c1-b5ce-091fee911d4c"}]},"__vid__":"q61KkrSpJbqG21X6XEyGu"},{"question":"我应该选择哪种 CBS 类型？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"在选择硬盘类型前，请先确认您需要用来进行什么样的工作类型数据存储："}]},{"type":"p","children":[{"text":""}]},{"type":"uli","children":[{"text":"如果您的硬盘用来存储 Web/App 应用、逻辑处理、小型数据库等常规场景数据，则推荐您使用高性能云硬盘来获得最佳性价比；"}]},{"type":"p","children":[{"text":""}]},{"type":"uli","children":[{"text":"如果您的硬盘用来存储中型数据库等对性能有一定要求的的场景数据，则推荐您使用通用型 SSD 云硬盘或 SSD 云硬盘来获得较高的性能。"}]},{"type":"p","children":[{"text":""}]},{"type":"uli","children":[{"text":"如果您的硬盘用来存储大型数据库、OLTP 业务、NoSQL 数据库、视频处理等工作负载较高、对性能要求较高的场景数据，则推荐您使用增强型 SSD 云硬盘或极速型 SSD 云硬盘来获得最高的性能。"}]}],"id":"195c9036-70d3-4395-8900-888c485a3b56"}]},"__vid__":"WEvKPZo-5b_cu3wFChGwg"},{"question":"在成功购买后，是否能更换云硬盘的类型？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"目前暂不支持云硬盘在不同类型之间进行切换，您可以对数据进行快照备份后通过快照创建一块您需要的新类型云硬盘。"}]}],"id":"195c9036-70d3-4395-8900-888c485a3b56"}]},"__vid__":"-Swn2KSSop155CTyXtrQd"}],"__vid__":"AeKLKDKJlLG6gqWsDj1Cl"},{"id":"2","label":"云硬盘使用和生命周期问题","list":[{"question":"是否支持多个实例访问同一块云硬盘？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"虽然您可以将多达 20 块云硬盘挂载到一个实例，但是目前暂不支持多个实例访问同一块云硬盘。"}]}],"id":"69514914-4be6-4a40-a40b-f1afb0c2d692"}]},"__vid__":"6Uxr57WSXVLYOYApw4HEq"},{"question":"能否将多块硬盘逻辑上合并成一块硬盘以获得更好性能？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"可以。您可以将挂载到 CVM 实例的多块云硬盘一起条带化，以实现超越单硬盘的更高的性能。详细内容请参考 "},{"type":"link","url":"https://cloud.tencent.com/document/product/362/2933","title":"https://cloud.tencent.com/document/product/362/2933","children":[{"text":"多块弹性云盘构建 LVM 逻辑卷"}]},{"text":"。"}]}],"id":"ab2bfb23-0988-43fa-9e9b-fa8ef84b40b1"}]},"__vid__":"SjiZgsbohwUAQpkKKJG3J"},{"question":"随云服务器一起购买的数据盘可以卸载吗？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"自2017年11月后，随云服务器一起购买的数据盘支持卸载和重新挂载。为避免卸载后重新挂载至另一台到期时间不同的云服务器上导致生命周期管理困难，我们在挂载时提供了对齐到期时间、设置自动续费等多种选项，请您注意选择合适的生命周期管理方式，避免因硬盘到期导致的数据丢失问题。"}]}],"id":"ca17ce23-bd56-4878-a2ba-8c629b4b85be"}]},"__vid__":"VO3MqIP3vmx8dWfSI1fvf"},{"question":"云硬盘到期后系统如何处理？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"云硬盘到期后，我们将对云硬盘的性能进行限制，但不会解除其与云服务器的关联关系（如有），您将在使用云硬盘时发现其性能有显著下降。同时，云硬盘到期前后系统均将以短信的形式通知您。"}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"仍未续费的情况下，系统将解除云硬盘与云服务器的关联关系并将云硬盘回收至回收站，此时续费即可恢复。"}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"若到期 7 日后仍未进行续费，硬盘将进入回收站，在回收站中继续保留 7 天，此时数据将继续为您保留，但硬盘已经为不可用状态。您可以选择恢复或者彻底销毁回收站中的云硬盘。若在回收站 7 日后仍未恢复，硬盘将彻底被销毁，所有数据不可找回。 "}]}],"id":"ca17ce23-bd56-4878-a2ba-8c629b4b85be"}]},"__vid__":"uPozWeLA5rH2wE9Tb9hdG"},{"question":"卸载云硬盘时会丢数据吗？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"云硬盘中的数据不因挂载或卸载而发生改变。为了保持数据一致，我们强烈建议："}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"在 Windows 操作系统下，为了保证数据完整性，建议您暂停对该磁盘的所有文件系统的读写操作，否则未完成读写的数据会丢失。"}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"在 Linux 操作系统下，您需要登录云服务器实例并对该磁盘进行 umount 命令行操作，命令执行成功后再进入控制台对磁盘进行卸载操作。"}]}],"id":"ca17ce23-bd56-4878-a2ba-8c629b4b85be"}]},"__vid__":"pGL-UR0VhuM6a6elC_MUS"}],"__vid__":"K0yl_REXZmO0bMbUIT-0-"},{"id":"计费","label":"快照常见问题","list":[{"question":"是否需要卸载硬盘或中断所有读写才能拍摄快照？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"否，您可以在硬盘连接和使用期间实时拍摄快照，不会影响您正常的业务。不过，快照只能捕获已写入 CBS 卷的数据，不包含应用程序或操作系统已在内存中缓存的数据。为了确保快照中捕获了所有应用程序的数据，我们建议您先彻底地暂停对硬盘的 IO 操作后进行快照制作。对于用作系统盘的 CBS 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卷。"}]}],"id":"fe26538e-00b5-429f-a6c3-1690adb4b087"}]},"__vid__":"Nphcoa0Gf-1xzk20rM94P"},{"question":"快照回滚是否需要关机？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"对于已经挂载在子机上的硬盘，回滚时需要关闭子机；对于未挂载的硬盘则可以直接执行回滚操作。"}]}],"id":"fe26538e-00b5-429f-a6c3-1690adb4b087"}]},"__vid__":"xzIp6zf9eES71FkZFDYYl"},{"question":"制作快照是否会影响硬盘性能？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"制作快照时根据硬盘写入数据的数据量情况将对硬盘读写性能有一定影响，因此我们推荐您在业务低谷时期进行快照操作。"}]}],"id":"fe26538e-00b5-429f-a6c3-1690adb4b087"}]},"__vid__":"ac5Oz73EdGt7bp6ffOkf4"},{"question":"制作快照到快照可用需要多久？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"快照制作的时间根据您硬盘写入量的情况、底层的读写情况等各种因素变化，较难预测。不过您无需担心，制作快照并不影响您正常使用硬盘。"}]}],"id":"fe26538e-00b5-429f-a6c3-1690adb4b087"}]},"__vid__":"EH4-y32bfhq6PwVX3Ymkf"}],"__vid__":"AMuYBh4W6G9g9r5zJ4btS"},{"id":"Ft94GW445005YF4AWO2G2","label":"硬盘性能常见问题","list":[{"question":"什么是随机 IO？什么是顺序 IO？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"uli","children":[{"text":"随机 IO 是指访问地址不连续，而是随机分布在磁盘 LUN 的寻址空间内。主要产生随机 IO 的业务包括：OLTP 业务、SQL、即时通信业务等。"}]},{"type":"uli","children":[{"text":"顺序 IO 指的是读写操作连续从相邻的地址访问数据，按逻辑块逐个进行。在顺序 IO 访问中，硬盘寻道时间大幅缩短，因为读写磁头基本不需要移动就可以访问下一个块。如数据备份、写日志流水等业务大部分产生的是顺序 IO。"}]}],"id":"763c2445-e5f6-47b9-bb5e-d88359f5a1a4"}]},"__vid__":"sohIp0eYKrsOpPWP8FATy"},{"question":"什么是 IOPS？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"IOPS (Input/Output Per Second) 即每秒的输入输出量（或读写次数），是衡量硬盘性能的重要指标之一。IOPS 是指单位时间内系统能处理的 I/O 请求数量，一般以每秒处理的 I/O 请求数量为单位，I/O 请求通常为读或写数据操作请求。"}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"传统磁盘本质上一种机械装置，如FC, SAS, SATA磁盘，转速通常为5400/7200/10000/15000 rpm不等。影响磁盘的关键因素是磁盘服务时间，即磁盘完成一个 I/O 请求所花费的时间，它由寻道时间、旋转延迟和数据传输时间三部分构成。"}]},{"type":"p","children":[{"text":""}]},{"type":"p","children":[{"text":"常见的，一块 7200 转的机械硬盘能提供 75 - 150 的 IOPS，15000 转的机械硬盘能提供 175-210 的 IOPS（具体的数值视访问模式，如顺序、随机以及 IO 大小等因素决定）。"}]}],"id":"763c2445-e5f6-47b9-bb5e-d88359f5a1a4"}]},"__vid__":"lFZ9u0HIi0F16FzEVHAFc"},{"question":"应用程序读写的 IO 大小是否会影响我获得的 IOPS 性能？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"会。对于给定的资源，您获得的 IOPS 取决应用程序读取和写入操作的 IO 大小。通常在 IO 大小为 256K 等小块读写时，能将硬盘的 IOPS 性能充分应用起来。"}]}],"id":"763c2445-e5f6-47b9-bb5e-d88359f5a1a4"}]},"__vid__":"6ZXe8C9nc4_7vQOuqH-FJ"},{"question":"应用程序读写的 IO 大小是否会影响我获得的吞吐性能？","answer":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"会。对于给定的资源，您获得的吞吐量取决于应用程序读取和写入操作的 IO 大小。通常在 IO 大小为 1M 等大块读写时，能将硬盘的吞吐性能充分应用起来。"}]}],"id":"763c2445-e5f6-47b9-bb5e-d88359f5a1a4"}]},"__vid__":"Tnb0wdbmWNnlimgkbidDl"}],"__vid__":"0PNx-St_QF5J26p7WMWyn"}]},"id":"SfIVqSf8_","collection":{"header":[{"kind":"block","name":"section-header","data":{"title":"常见问题"},"id":"G-VjGIlR7O"}],"addons":[{"kind":"block","name":"section-footer","data":{"content":{"mod":"slate","content":[{"type":"topic","children":[{"type":"p","children":[{"text":"更多问题请查看 "},{"type":"link","url":"https://cloud.tencent.com/document/product/362/17818","title":"https://cloud.tencent.com/document/product/362/17818","children":[{"text":"常见问题"}]},{"text":"，也可在 "},{"type":"link","url":"https://cloud.tencent.com/developer/ask","title":"https://cloud.tencent.com/developer/ask","children":[{"text":"问答社区"}]},{"text":" 中进行提问。"}]}],"id":"2270e8ed-9c1b-4fd9-be82-74d07b7387ee"}]}},"id":"OavXcY4qU2"}]},"className":"bg-gray"},{"kind":"block","name":"call2action","data":{"content":"按照我们的入门指南，只需点几次鼠标，即可创建您的首个腾讯云云硬盘。","buttons":[{"title":"开始使用","to":"https://console.cloud.tencent.com/cvm/cbs","__vid__":"iY0GLnDHm12PTffU-FprM"}]},"id":"xhTpDt9FO"}]},"settings":{"seo":{"title":"云硬盘_持久性块存储_弹性块存储-腾讯云","keywords":"云硬盘,持久性块存储,弹性块存储,云存储","description":"云硬盘（CBS）为您提供云服务器的持久性块存储服务。云硬盘中的数据自动地在可用区内以多副本冗余方式存储，避免数据的单点故障风险，提供高达99.9999999% 的数据可靠性。云硬盘提供多种类型及规格的磁盘实例，满足稳定低延迟的存储性能要求。"},"siteSearch":{"enable":true}}};</script> <script src="https://cloudcache.tencent-cloud.cn/qcloud/trisys-landing/materials/material-product.adf1d6ccb.js"></script> <script> if (window.__TRI_PAGE_STATE__ && window.__TRI_PAGE_STATE__.settings && window.__TRI_PAGE_STATE__.settings.toc && window.__TRI_PAGE_STATE__.settings.toc.enable ) { window.__TRI_PAGE_STATE__.settings.toc.enable = false; } window.__TRI_PAGE_STATE__.legacy = false; if 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