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id="stalker" class="issue-header js-stalker"><div class="issue-header-content"><div class="aui-page-header" ><div class="aui-page-header-inner"><div class="aui-page-header-image" ><span id="12314526" class="aui-avatar aui-avatar-large aui-avatar-project"><span class="aui-avatar-inner"><img id="project-avatar" alt="Uploaded image for project: 'Samza'" src="https://issues.apache.org/jira/secure/projectavatar?pid=12314526&avatarId=36734" /></span></span></div><div class="aui-page-header-main" ><ol class="aui-nav aui-nav-breadcrumbs"><li><a id="project-name-val" href="/jira/browse/SAMZA">Samza</a></li><li><a class="issue-link" data-issue-key="SAMZA-537" href="/jira/browse/SAMZA-537" id="key-val" rel="12770816">SAMZA-537</a></li></ol><h1 id="summary-val">RocksDB java TTL support</h1></div><div class="aui-page-header-actions" ><div id="issue-header-pager"></div></div></div></div><div class="command-bar"><div class="ops-cont"><div class="ops-menus aui-toolbar2"><div 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From here issues are either reopened, or are closed.</span>">Resolved</span> </span> </div> </li> <li class="item new"> <div class="wrap"> <strong class="name" title="Priority"> <label for="priority-field">Priority:</label> </strong> <span id="priority-val" class="value"> <img alt="" height="16" src="/jira/images/icons/priorities/major.svg" title="Major - Major loss of function." width="16" /> Major </span> </div> </li> <li class="item item-right"> <div class="wrap"> <strong class="name" title="Resolution">Resolution:</strong> <span id="resolution-val" class="value resolved" > Fixed </span> </div> </li> <li class="item"> <div class="wrap"> <strong class="name" title="Affects Version/s"> <label for="versions-textarea">Affects Version/s:</label> </strong> <span id="versions-val" class="value"> <span class="shorten" id="versions-field"> <span title="0.8.0 ">0.8.0</span>, <span title="0.9.0 ">0.9.0</span> </span> </span> </div> </li> <li class="item item-right"> <div class="wrap"> <strong class="name" title="Fix Version/s"> <label for="fixVersions"> Fix Version/s: </label> </strong> <span id="fixfor-val" class="value"> <span class="shorten" id="fixVersions-field"> <a href="/jira/issues/?jql=project+%3D+SAMZA+AND+fixVersion+%3D+0.10.0" title="0.10.0 ">0.10.0</a> </span> </span> </div> </li> <li class="item"> <div class="wrap"> <strong class="name" title="Component/s"> <label for="components">Component/s:</label> </strong> <span id="components-val" class="value"> <span class="shorten" id="components-field"> <a href="/jira/issues/?jql=project+%3D+SAMZA+AND+component+%3D+kv" title="kv Samza Key/Value">kv</a> </span> </span> </div> </li> <li class="item full-width"> <div class="wrap" id="wrap-labels"> <strong class="name" title="Labels"> <label for="labels-textarea">Labels:</label> </strong> <div class="labels-wrap value"> <span class="labels" id="labels-12770816-value">None</span> </div> </div> </li> </ul> </div></div><div id=descriptionmodule class="module toggle-wrap"><div id="descriptionmodule_heading" class="mod-header"><button class="aui-button toggle-title" aria-label="Description" aria-controls="descriptionmodule" aria-expanded="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14"><g fill="none" fill-rule="evenodd"><path d="M3.29175 4.793c-.389.392-.389 1.027 0 1.419l2.939 2.965c.218.215.5.322.779.322s.556-.107.769-.322l2.93-2.955c.388-.392.388-1.027 0-1.419-.389-.392-1.018-.392-1.406 0l-2.298 2.317-2.307-2.327c-.194-.195-.449-.293-.703-.293-.255 0-.51.098-.703.293z" fill="#344563"/></g></svg></button><h4 class="toggle-title" id="descriptionmodule-label">Description</h4><ul class="ops"></ul></div><div class="mod-content"><div id="description-val" class="field-ignore-highlight"> <div class="user-content-block"> <p>Looks like RocksDB now has support TTL in java as well (only present in C first).<br/> <a href="https://reviews.facebook.net/D31449" class="external-link" target="_blank" rel="nofollow noopener">https://reviews.facebook.net/D31449</a></p> <p>It would be great if we can add support for this, we would have to do two things:<br/> 1. Make a new RockDB java release<br/> 2. expose the configuration in Samza java</p> </div> </div> </div></div><div id=dnd-metadata class="module toggle-wrap"><div id="dnd-metadata_heading" class="mod-header"><button class="aui-button toggle-title" aria-label="Attachments" aria-controls="dnd-metadata" aria-expanded="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14"><g fill="none" fill-rule="evenodd"><path d="M3.29175 4.793c-.389.392-.389 1.027 0 1.419l2.939 2.965c.218.215.5.322.779.322s.556-.107.769-.322l2.93-2.955c.388-.392.388-1.027 0-1.419-.389-.392-1.018-.392-1.406 0l-2.298 2.317-2.307-2.327c-.194-.195-.449-.293-.703-.293-.255 0-.51.098-.703.293z" fill="#344563"/></g></svg></button><h4 class="toggle-title" id="dnd-metadata-label">Attachments</h4><ul class="ops"></ul></div><div class="mod-content"><div id="dnd-metadata-webpanel" data-can-attach="false" data-project-type="software" data-upload-limit="62914560" data-thumbnails-allowed="false"></div></div></div><div id=attachmentmodule class="module toggle-wrap"><div id="attachmentmodule_heading" class="mod-header"><button class="aui-button toggle-title" aria-label="Attachments" aria-controls="attachmentmodule" aria-expanded="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14"><g fill="none" fill-rule="evenodd"><path d="M3.29175 4.793c-.389.392-.389 1.027 0 1.419l2.939 2.965c.218.215.5.322.779.322s.556-.107.769-.322l2.93-2.955c.388-.392.388-1.027 0-1.419-.389-.392-1.018-.392-1.406 0l-2.298 2.317-2.307-2.327c-.194-.195-.449-.293-.703-.293-.255 0-.51.098-.703.293z" fill="#344563"/></g></svg></button><h4 class="toggle-title" id="attachmentmodule-label">Attachments</h4><ul class="ops"><li class="drop"><div class="aui-dd-parent"><button class="aui-button aui-button-compact aui-button-subtle js-default-dropdown" title="Options" aria-label="Attachments panel options"><span class="aui-icon aui-icon-small aui-iconfont-more">Options</span></button><div class="aui-dropdown-content aui-list"><ul id="attachment-sorting-options"class="aui-list-section aui-first"><li class="aui-list-item"><a id="attachment-sort-key-name"href="/jira/browse/SAMZA-537?attachmentSortBy=fileName#attachmentmodule"class="aui-list-checked aui-checked aui-list-item-link"title="viewissue.subtasks.tab.show.all.name"><span>Sort By Name</span></a></li><li class="aui-list-item"><a id="attachment-sort-key-date"href="/jira/browse/SAMZA-537?attachmentSortBy=dateTime#attachmentmodule"class="aui-list-checked aui-list-item-link"title="Sort By Date"><span>Sort By Date</span></a></li></ul><ul id="attachment-sorting-order-options"class="aui-list-section aui-last"><li class="aui-list-item"><a id="attachment-sort-direction-asc"href="/jira/browse/SAMZA-537?attachmentOrder=asc#attachmentmodule"class="aui-list-checked aui-checked aui-list-item-link"title="Ascending"><span>Ascending</span></a></li><li class="aui-list-item"><a id="attachment-sort-direction-desc"href="/jira/browse/SAMZA-537?attachmentOrder=desc#attachmentmodule"class="aui-list-checked aui-list-item-link"title="Descending"><span>Descending</span></a></li></ul></div></div></li></ul></div><div class="mod-content"><ol id="file_attachments" class="item-attachments" data-sort-key="fileName" data-sort-order="asc"><li class="attachment-content js-file-attachment" data-attachment-id="12732703"data-issue-id="12770816"data-attachment-type="file"><div class="attachment-thumb"><a href="/jira/secure/attachment/12732703/0001-RocksDB-TTL.patch" draggable="true" data-downloadurl="text/plain:0001-RocksDB-TTL.patch:https://issues.apache.org/jira/secure/attachment/12732703/0001-RocksDB-TTL.patch"><span class="aui-icon aui-icon-small attachment-icon aui-iconfont-file-txt" title="Text File"></span></a></div><dl><dt class="attachment-title"><a href="/jira/secure/attachment/12732703/0001-RocksDB-TTL.patch" title="Latest 13/May/15 23:18 - Naveen Somasundaram" draggable="true" data-downloadurl="text/plain:0001-RocksDB-TTL.patch:https://issues.apache.org/jira/secure/attachment/12732703/0001-RocksDB-TTL.patch">0001-RocksDB-TTL.patch</a></dt><dd class="attachment-delete"><span class="icon"></span></dd><dd class="attachment-date"><time class="livestamp" datetime="2015-05-13T23:18:29.810Z">13/May/15 23:18</time></dd><dd class="attachment-size">13 kB</dd><dd class="attachment-author">Naveen Somasundaram</dd></dl></li><li class="attachment-content js-file-attachment" data-attachment-id="12731392"data-issue-id="12770816"data-attachment-type="file"><div class="attachment-thumb"><a href="/jira/secure/attachment/12731392/0001-RocksDB-validation.patch" draggable="true" data-downloadurl="text/plain:0001-RocksDB-validation.patch:https://issues.apache.org/jira/secure/attachment/12731392/0001-RocksDB-validation.patch"><span class="aui-icon aui-icon-small attachment-icon aui-iconfont-file-txt" title="Text File"></span></a></div><dl><dt class="attachment-title"><a href="/jira/secure/attachment/12731392/0001-RocksDB-validation.patch" title="Latest 08/May/15 08:14 - Naveen Somasundaram" draggable="true" data-downloadurl="text/plain:0001-RocksDB-validation.patch:https://issues.apache.org/jira/secure/attachment/12731392/0001-RocksDB-validation.patch">0001-RocksDB-validation.patch</a></dt><dd class="attachment-delete"><span class="icon"></span></dd><dd class="attachment-date"><time class="livestamp" datetime="2015-05-08T08:14:17.797Z">08/May/15 08:14</time></dd><dd class="attachment-size">2 kB</dd><dd class="attachment-author">Naveen Somasundaram</dd></dl></li></ol></div></div><div id=linkingmodule class="module toggle-wrap"><div id="linkingmodule_heading" class="mod-header"><button class="aui-button toggle-title" aria-label="Issue Links" aria-controls="linkingmodule" aria-expanded="true"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14"><g fill="none" fill-rule="evenodd"><path d="M3.29175 4.793c-.389.392-.389 1.027 0 1.419l2.939 2.965c.218.215.5.322.779.322s.556-.107.769-.322l2.93-2.955c.388-.392.388-1.027 0-1.419-.389-.392-1.018-.392-1.406 0l-2.298 2.317-2.307-2.327c-.194-.195-.449-.293-.703-.293-.255 0-.51.098-.703.293z" fill="#344563"/></g></svg></button><h4 class="toggle-title" id="linkingmodule-label">Issue Links</h4><ul class="ops"></ul></div><div class="mod-content"> <div class="links-container" data-default-link-icon="/jira/images/icons/generic_link_16.png"> <dl class="links-list "> <dt title="duplicates">duplicates</dt> <dd id="internal-12760261_12310000" > <div class="link-content"> <p> <img src="/jira/secure/viewavatar?size=xsmall&avatarId=21133&avatarType=issuetype" width="16" height="16" title="Bug - A problem which impairs or prevents the functions of the product." alt="Bug - A problem which impairs or prevents the functions of the product." /> <span title="SAMZA-492: Support RocksDB TTL"> <a href="/jira/browse/SAMZA-492" data-issue-key="SAMZA-492" class="issue-link link-title resolution">SAMZA-492</a> <span class="link-summary">Support RocksDB TTL</span> </span> </p> <ul class="link-snapshot"> <li class="priority"> <img src="/jira/images/icons/priorities/major.svg" width="16" height="16" title="Major - Major loss of function." alt="Major - Major loss of function." /> </li> <li class="status"> <span class=" jira-issue-status-lozenge aui-lozenge jira-issue-status-lozenge-green jira-issue-status-lozenge-done aui-lozenge-subtle jira-issue-status-lozenge-max-width-short" data-tooltip="<span class="jira-issue-status-tooltip-title">Resolved</span><br><span class="jira-issue-status-tooltip-desc">A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.</span>">Resolved</span> </li> </ul> </div> </dd> </dl> <dl class="links-list "> <dt title="incorporates">incorporates</dt> <dd id="internal-12749952_12310010" > <div class="link-content"> <p> <img src="/jira/secure/viewavatar?size=xsmall&avatarId=21133&avatarType=issuetype" width="16" height="16" title="Bug - A problem which impairs or prevents the functions of the product." alt="Bug - A problem which impairs or prevents the functions of the product." /> <span title="SAMZA-442: Upgrade RocksDB to 3.10"> <a href="/jira/browse/SAMZA-442" data-issue-key="SAMZA-442" class="issue-link link-title resolution">SAMZA-442</a> <span class="link-summary">Upgrade RocksDB to 3.10</span> </span> </p> <ul class="link-snapshot"> <li class="priority"> <img src="/jira/images/icons/priorities/major.svg" width="16" height="16" title="Major - Major loss of function." alt="Major - Major loss of function." /> </li> <li class="status"> <span class=" jira-issue-status-lozenge aui-lozenge jira-issue-status-lozenge-green jira-issue-status-lozenge-done aui-lozenge-subtle jira-issue-status-lozenge-max-width-short" data-tooltip="<span class="jira-issue-status-tooltip-title">Closed</span><br><span class="jira-issue-status-tooltip-desc">The issue is considered finished, the resolution is correct. Issues which are not closed can be reopened.</span>">Closed</span> </li> </ul> </div> </dd> </dl> <dl class="links-list "> <dt title="relates to">relates to</dt> <dd id="internal-12829716_10030" > <div class="link-content"> <p> <img src="/jira/secure/viewavatar?size=xsmall&avatarId=21140&avatarType=issuetype" width="16" height="16" title="Improvement - An improvement or enhancement to an existing feature or task." alt="Improvement - An improvement or enhancement to an existing feature or task." /> <span title="SAMZA-677: Support changelog for stores with TTL"> <a href="/jira/browse/SAMZA-677" data-issue-key="SAMZA-677" class="issue-link link-title">SAMZA-677</a> <span class="link-summary">Support changelog for stores with TTL</span> </span> </p> <ul class="link-snapshot"> <li class="priority"> <img src="/jira/images/icons/priorities/major.svg" width="16" height="16" title="Major - Major loss of function." alt="Major - Major loss of function." /> </li> <li class="status"> <span class=" 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class="ops"></ul></div><div class="mod-content"> <div class="item-details people-details" id="peopledetails"> <dl> <dt title="Assignee"> <label for="assignee-field">Assignee:</label> </dt> <dd> <span id="assignee-val" class="view-issue-field"> <span class="user-hover" id="issue_summary_assignee_naveenatceg" rel="naveenatceg"> <span class="aui-avatar aui-avatar-small"><span class="aui-avatar-inner"><img src="https://issues.apache.org/jira/secure/useravatar?size=small&avatarId=10452" alt="naveenatceg" /></span></span> Naveen Somasundaram </span> </span> </dd> </dl> <dl> <dt title="Reporter"> <label for="reporter-field">Reporter:</label> </dt> <dd> <span id="reporter-val" class="view-issue-field"> <span class="user-hover" id="issue_summary_reporter_naveenatceg" rel="naveenatceg"> <span class="aui-avatar aui-avatar-small"><span class="aui-avatar-inner"><img src="https://issues.apache.org/jira/secure/useravatar?size=small&avatarId=10452" alt="naveenatceg" /></span></span> Naveen 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data-id=\\\"worklog-tabpanel\\\"\\n data-key=\\\"com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\"\\n data-label=\\\"Work Log\\\"\\n data-href=\\\"\\/jira\\/browse\\/SAMZA-537?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"worklog-tabpanel\\\" href=\\\"\\/jira\\/browse\\/SAMZA-537?page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel\\\" class=\\\"ajax-activity-content\\\"\u003eWork Log\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \\n \u003cli class=\\\"menu-item \\\"\\n id=\\\"changehistory-tabpanel\\\"\\n data-id=\\\"changehistory-tabpanel\\\"\\n data-key=\\\"com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel\\\"\\n data-label=\\\"History\\\"\\n data-href=\\\"\\/jira\\/browse\\/SAMZA-537?page=com.atlassian.jira.plugin.system.issuetabpanels:changehistory-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"changehistory-tabpanel\\\" 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data-key=\\\"com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\"\\n data-label=\\\"Transitions\\\"\\n data-href=\\\"\\/jira\\/browse\\/SAMZA-537?page=com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\"\\n \u003e\\n \u003ca id=\\\"transitions-summary-tabpanel\\\" href=\\\"\\/jira\\/browse\\/SAMZA-537?page=com.googlecode.jira-suite-utilities:transitions-summary-tabpanel\\\" class=\\\"ajax-activity-content\\\"\u003eTransitions\u003c\\/a\u003e\\n \u003c\\/li\u003e\\n \u003c\\/ul\u003e\\n\\n \u003cdiv class=\\\"sortwrap\\\"\u003e\\n \u003ca class=\\\"issue-activity-sort-link ajax-activity-content\\\" rel=\\\"nofollow\\\" data-tab-sort data-order=\\\"desc\\\" href=\\\"\\/jira\\/browse\\/SAMZA-537?actionOrder=desc\\\" title=\\\"Ascending order - Click to sort in descending order\\\"\u003e\\n \u003cspan class=\\\"aui-icon aui-icon-small aui-iconfont-up\\\"\u003eAscending order - Click to sort in descending order\u003c\\/span\u003e\\n \u003c\\/a\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"tabs-pane active-pane\\\"\u003e\u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"issuePanelWrapper\\\"\u003e\\n \u003cdiv class=\\\"issuePanelProgress\\\"\u003e\u003c\\/div\u003e\\n \u003cdiv class=\\\"issuePanelContainer\\\" id=\\\"issue_actions_container\\\"\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14522828\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14522828_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14522828&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14522828\' class=\'commentdate_14522828_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'01\\/May\\/15 06:31\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-01T06:31:24+0000\'\u003e01\\/May\\/15 06:31\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eAdded few comments in the RB.\u003c\\/p\u003e\\n\\n\u003cp\u003eBTW, RB: \u003ca href=\\\"https:\\/\\/reviews.apache.org\\/r\\/33735\\/\\\" class=\\\"external-link\\\" target=\\\"_blank\\\" rel=\\\"nofollow noopener\\\"\u003ehttps:\\/\\/reviews.apache.org\\/r\\/33735\\/\u003c\\/a\u003e\u003c\\/p\u003e\\n\\n\u003cp\u003eJust one question about this feature: what will happen if we openWithReadOnly the same db that is opened and being written by another application? Will we see all the values, even some of which are not seeable in the open-and-writing application (because TTL)?\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14522828_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14522828&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14522828\' class=\'commentdate_14522828_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'01\\/May\\/15 06:31\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-01T06:31:24+0000\'\u003e01\\/May\\/15 06:31\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Added few comments in the RB. \\n\\n BTW, RB: https:\\/\\/reviews.apache.org\\/r\\/33735\\/ \\n\\n Just one question about this feature: what will happen if we openWithReadOnly the same db that is opened and being written by another application? Will we see all the values, even some of which are not seeable in the open-and-writing application (because TTL)? \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14522961\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14522961_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14522961&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14522961\' class=\'commentdate_14522961_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'01\\/May\\/15 09:03\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-01T09:03:50+0000\'\u003e01\\/May\\/15 09:03\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eA few more things that may need to be well documented:\u003c\\/p\u003e\\n\u003cul\u003e\\n\\t\u003cli\u003ewhat will happen in restoring RocksDB? Will we get all the \\\"died\\\" values?\u003c\\/li\u003e\\n\\t\u003cli\u003ewhat will happen if users enable ttl at first and then disable it in another run? Will this cause corruption?\\n\u003cblockquote\u003e\\n\u003cp\u003eCalling DB::Open directly to re-open a db created by this API will get corrupt values(timestamp suffixed) and no ttl effect will be there during the second Open, so use this API consistently to open the db\u003c\\/p\u003e\u003c\\/blockquote\u003e\u003c\\/li\u003e\\n\\t\u003cli\u003efirst disable ttl then enable it? change the ttl time?\u003c\\/li\u003e\\n\u003c\\/ul\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14522961_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14522961&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14522961\' class=\'commentdate_14522961_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'01\\/May\\/15 09:03\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-01T09:03:50+0000\'\u003e01\\/May\\/15 09:03\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e A few more things that may need to be well documented: \\n \\n\\t what will happen in restoring RocksDB? Will we get all the \\\"died\\\" values? \\n\\t what will happen if users enable ttl at first and then disable it in another run? Will this cause corruption?\\n \\n Calling DB::Open directly to re-open a db created by this API will get corrupt values(timestamp suffixed) and no ttl effect will be there during the second Open, so use this API consistently to open the db \\n\\t first disable ttl then enable it? change the ttl time? \\n \\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14532009\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14532009_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14532009&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14532009\' class=\'commentdate_14532009_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'07\\/May\\/15 05:08\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-07T05:08:01+0000\'\u003e07\\/May\\/15 05:08\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e+1 for the RB. \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\" class=\\\"user-hover\\\" rel=\\\"naveenatceg\\\"\u003enaveenatceg\u003c\\/a\u003e, could you upload the patch here?\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14532009_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14532009&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14532009\' class=\'commentdate_14532009_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'07\\/May\\/15 05:08\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-07T05:08:01+0000\'\u003e07\\/May\\/15 05:08\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e +1 for the RB. naveenatceg , could you upload the patch here? \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14533212\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14533212_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14533212&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14533212\' class=\'commentdate_14533212_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'07\\/May\\/15 19:03\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-07T19:03:12+0000\'\u003e07\\/May\\/15 19:03\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eAlso, there are four concerns I have for this patch before committing as I mentioned in the previous comment.\u003c\\/p\u003e\\n\\n\u003cp\u003e1. what will happen if we openWithReadOnly the same db that is opened and being written by another application? Will we see all the values, even some of which are not seeable in the open-and-writing application (because TTL)?\u003c\\/p\u003e\\n\\n\u003cp\u003e2. what will happen in restoring RocksDB? Will we get all the \\\"died\\\" values?\u003c\\/p\u003e\\n\\n\u003cp\u003e3. what will happen if users enable ttl at first and then disable it in another run? Will this cause corruption?\u003c\\/p\u003e\\n\u003cblockquote\u003e\\n\u003cp\u003eCalling DB::Open directly to re-open a db created by this API will get corrupt values(timestamp suffixed) and no ttl effect will be there during the second Open, so use this API consistently to open the db\u003c\\/p\u003e\u003c\\/blockquote\u003e\\n\\n\u003cp\u003e4. Is it possible to first disable ttl then enable it? Or if it is possible to change change the ttl time when restarting?\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14533212_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14533212&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14533212\' class=\'commentdate_14533212_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'07\\/May\\/15 19:03\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-07T19:03:12+0000\'\u003e07\\/May\\/15 19:03\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Also, there are four concerns I have for this patch before committing as I mentioned in the previous comment. \\n\\n 1. what will happen if we openWithReadOnly the same db that is opened and being written by another application? Will we see all the values, even some of which are not seeable in the open-and-writing application (because TTL)? \\n\\n 2. what will happen in restoring RocksDB? Will we get all the \\\"died\\\" values? \\n\\n 3. what will happen if users enable ttl at first and then disable it in another run? Will this cause corruption? \\n \\n Calling DB::Open directly to re-open a db created by this API will get corrupt values(timestamp suffixed) and no ttl effect will be there during the second Open, so use this API consistently to open the db \\n\\n 4. Is it possible to first disable ttl then enable it? Or if it is possible to change change the ttl time when restarting? \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14534095\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14534095_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14534095&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14534095\' class=\'commentdate_14534095_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 08:24\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T08:24:24+0000\'\u003e08\\/May\\/15 08:24\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eHey Yan,\u003cbr\\/\u003e\\n1. I think we should document this, with Changelog enabled, we will get expired values. There is no way for us to know this as a Framework (This happens at RocksDB level). It really doesn\'t make sense to have Changelog enabled if you are using TTL. Should we just throw an Exception if Changelog is enabled for a TTL based store ? What do you think ? Or should we just let the user decide the behavior ? My vote is for throwing not allow Changelog if TTL is enabled. \u003cbr\\/\u003e\\n2,3. Our configuration page links to their RocksDB TTL page, where both of these are explained.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14534095_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14534095&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14534095\' class=\'commentdate_14534095_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 08:24\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T08:24:24+0000\'\u003e08\\/May\\/15 08:24\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Hey Yan, \\n1. I think we should document this, with Changelog enabled, we will get expired values. There is no way for us to know this as a Framework (This happens at RocksDB level). It really doesn\'t make sense to have Changelog enabled if you are using TTL. Should we just throw an Exception if Changelog is enabled for a TTL based store ? What do you think ? Or should we just let the user decide the behavior ? My vote is for throwing not allow Changelog if TTL is enabled. \\n2,3. Our configuration page links to their RocksDB TTL page, where both of these are explained. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14535174\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14535174_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14535174&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14535174\' class=\'commentdate_14535174_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 18:25\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T18:25:36+0000\'\u003e08\\/May\\/15 18:25\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cblockquote\u003e\\n\u003cp\u003e My vote is for throwing not allow Changelog if TTL is enabled. \u003c\\/p\u003e\u003c\\/blockquote\u003e\\n\\n\u003cp\u003e+1 for this. Also Yi Pan has comments in the RB.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14535174_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14535174&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14535174\' class=\'commentdate_14535174_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 18:25\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T18:25:36+0000\'\u003e08\\/May\\/15 18:25\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \\n My vote is for throwing not allow Changelog if TTL is enabled. \\n\\n +1 for this. Also Yi Pan has comments in the RB. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14535554\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"nickpan47\\\" id=\\\"commentauthor_14535554_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=nickpan47\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"nickpan47\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yi Pan\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14535554&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14535554\' class=\'commentdate_14535554_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 21:17\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T21:17:13+0000\'\u003e08\\/May\\/15 21:17\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eHi, guys, I talked to \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\" class=\\\"user-hover\\\" rel=\\\"naveenatceg\\\"\u003enaveenatceg\u003c\\/a\u003e offline and here is my opinion:\u003c\\/p\u003e\\n\\n\u003col\u003e\\n\\t\u003cli\u003eThe current RocksDB TTL feature is only kept in local and can not be restored to other host\u003c\\/li\u003e\\n\\t\u003cli\u003eBuild the TTL support w\\/ changelog and recovery on another host is a bigger scope of task that we need to be careful about\u003c\\/li\u003e\\n\u003c\\/ol\u003e\\n\\n\\n\u003cp\u003eGiven that the use case that needs TTL is often targeted to transient data set, I would think that RocksDB w\\/ TTL w\\/o changelog can satisfy some use cases, as \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\" class=\\\"user-hover\\\" rel=\\\"naveenatceg\\\"\u003enaveenatceg\u003c\\/a\u003e suggest.\u003c\\/p\u003e\\n\\n\u003cp\u003eI would suggest that we document the limitation on this feature well, noting that in the current release, all TTL enabled RocksDB store will not be durable upon recovery and will be local only. And we should continue the effort to add recovery support to TTL enabled RocksDB stores in the future.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"nickpan47\\\" id=\\\"commentauthor_14535554_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=nickpan47\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"nickpan47\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yi Pan\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14535554&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14535554\' class=\'commentdate_14535554_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'08\\/May\\/15 21:17\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-08T21:17:13+0000\'\u003e08\\/May\\/15 21:17\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Hi, guys, I talked to naveenatceg offline and here is my opinion: \\n\\n \\n\\t The current RocksDB TTL feature is only kept in local and can not be restored to other host \\n\\t Build the TTL support w\\/ changelog and recovery on another host is a bigger scope of task that we need to be careful about \\n \\n\\n\\n Given that the use case that needs TTL is often targeted to transient data set, I would think that RocksDB w\\/ TTL w\\/o changelog can satisfy some use cases, as naveenatceg suggest. \\n\\n I would suggest that we document the limitation on this feature well, noting that in the current release, all TTL enabled RocksDB store will not be durable upon recovery and will be local only. And we should continue the effort to add recovery support to TTL enabled RocksDB stores in the future. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14540153\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jhartman\\\" id=\\\"commentauthor_14540153_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jhartman\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jhartman\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Joshua Hartman\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540153&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540153\' class=\'commentdate_14540153_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 16:26\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T16:26:28+0000\'\u003e12\\/May\\/15 16:26\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eAs a dissenting perspective on TTL without backups: \u003c\\/p\u003e\\n\\n\u003cp\u003eOur application will rely on TTL to help us manage out some state. We have rules that we must deduplicate or eliminate content processed for a given user within a certain time window. TTL support is nice for this but if the store isn\'t durable we can\'t implement the feature. For our use case, it is acceptable for the TTL to be best-case. For instance, if we ask that something live only 1 day but it lives for 1 day and 6 hours that\'s fine. We can always handle this by excluding it from the read in the application layer as well. I think this also applies to any app that wants to use TTL to do a stream join.\u003c\\/p\u003e\\n\\n\u003cp\u003eI think a lot of applications would have similar characteristics. \u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"jhartman\\\" id=\\\"commentauthor_14540153_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=jhartman\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"jhartman\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Joshua Hartman\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540153&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540153\' class=\'commentdate_14540153_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 16:26\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T16:26:28+0000\'\u003e12\\/May\\/15 16:26\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e As a dissenting perspective on TTL without backups: \\n\\n Our application will rely on TTL to help us manage out some state. We have rules that we must deduplicate or eliminate content processed for a given user within a certain time window. TTL support is nice for this but if the store isn\'t durable we can\'t implement the feature. For our use case, it is acceptable for the TTL to be best-case. For instance, if we ask that something live only 1 day but it lives for 1 day and 6 hours that\'s fine. We can always handle this by excluding it from the read in the application layer as well. I think this also applies to any app that wants to use TTL to do a stream join. \\n\\n I think a lot of applications would have similar characteristics. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14540653\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14540653_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540653&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540653\' class=\'commentdate_14540653_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 20:34\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T20:34:54+0000\'\u003e12\\/May\\/15 20:34\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cblockquote\u003e\\n\u003cp\u003eWe have rules that we must deduplicate or eliminate content processed for a given user within a certain time window. \u003c\\/p\u003e\u003c\\/blockquote\u003e\\n\\n\u003cp\u003eIs it possible to do this in window() method?\u003c\\/p\u003e\\n\\n\u003cblockquote\u003e\\n\u003cp\u003e TTL support is nice for this but if the store isn\'t durable we can\'t implement the feature. \u003c\\/p\u003e\u003c\\/blockquote\u003e\\n\\n\u003cp\u003eI agree on this. Without the durability, it only satisfies a few use cases. It\'s better to have the backup feature. The reason we do not implement this is because currently the TTL happens in Rocksdb layer while the backup happens in Samza layer. Not sure how we will tackle this problem. Also there are some other concerns: when we set the TTL to a lower time, say, 100 seconds, what if the recover takes 100 seconds (in a bad situation), do we delete all the messages ? \u003c\\/p\u003e\\n\\n\u003cp\u003eAfter further discussion, I think we should support the backup feature in the future. Maybe in anther separate ticket. Welcome to discuss and contribute. \u003cimg class=\\\"emoticon\\\" src=\\\"\\/jira\\/images\\/icons\\/emoticons\\/smile.png\\\" height=\\\"16\\\" width=\\\"16\\\" align=\\\"absmiddle\\\" alt=\\\"\\\" border=\\\"0\\\"\\/\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14540653_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540653&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540653\' class=\'commentdate_14540653_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 20:34\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T20:34:54+0000\'\u003e12\\/May\\/15 20:34\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \\n We have rules that we must deduplicate or eliminate content processed for a given user within a certain time window. \\n\\n Is it possible to do this in window() method? \\n\\n \\n TTL support is nice for this but if the store isn\'t durable we can\'t implement the feature. \\n\\n I agree on this. Without the durability, it only satisfies a few use cases. It\'s better to have the backup feature. The reason we do not implement this is because currently the TTL happens in Rocksdb layer while the backup happens in Samza layer. Not sure how we will tackle this problem. Also there are some other concerns: when we set the TTL to a lower time, say, 100 seconds, what if the recover takes 100 seconds (in a bad situation), do we delete all the messages ? \\n\\n After further discussion, I think we should support the backup feature in the future. Maybe in anther separate ticket. Welcome to discuss and contribute. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14540676\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14540676_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540676&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540676\' class=\'commentdate_14540676_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 20:46\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T20:46:43+0000\'\u003e12\\/May\\/15 20:46\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\" class=\\\"user-hover\\\" rel=\\\"closeuris\\\"\u003ecloseuris\u003c\\/a\u003e, I thought about this a little bit more, \u003cbr\\/\u003e\\nI was thinking as a short term solution:\u003cbr\\/\u003e\\nWhat if the users can set the TTL to same value as the Kafka\'s retention time ? \u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=jhartman\\\" class=\\\"user-hover\\\" rel=\\\"jhartman\\\"\u003ejhartman\u003c\\/a\u003e Will that work for your use case ? Kafka will wipe out data with a fixed time, within that time interval it\'s OK to restore your store. This means that we\'ll revert the exception patch and just allow users to create Changelog streams for even TTL based ones. I agree, it\'s kind of a gamble, where you will see users accidentally enabling TTL and do not understand the implications of using it. Or even worse, keep writing more and more data till they run of disk before they realize that kafka doesn\'t expunge expired records. But it\'s too hard to control. We can do further optimizations in another ticket - to create changelog topic with TTL retention, or if already exists, verify if it matches. But that\'s the best we can do. What are your thoughts ?\u003c\\/p\u003e\\n\\n\u003cp\u003eAs long term solution:\u003cbr\\/\u003e\\nWe store some meta information with each key-value (preferably in the key - but this will cause log compaction to fail), so we need to think more about this in detail, but essentially a meta information as a part of the message itself. And we do a restore, we skip the ones which have expired and write a expired_key -> null, which will trigger log compaction and wipe the data out eventually. This probably needs a lot more work and thought. \u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14540676_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14540676&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14540676\' class=\'commentdate_14540676_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'12\\/May\\/15 20:46\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-12T20:46:43+0000\'\u003e12\\/May\\/15 20:46\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e closeuris , I thought about this a little bit more, \\nI was thinking as a short term solution: \\nWhat if the users can set the TTL to same value as the Kafka\'s retention time ? jhartman Will that work for your use case ? Kafka will wipe out data with a fixed time, within that time interval it\'s OK to restore your store. This means that we\'ll revert the exception patch and just allow users to create Changelog streams for even TTL based ones. I agree, it\'s kind of a gamble, where you will see users accidentally enabling TTL and do not understand the implications of using it. Or even worse, keep writing more and more data till they run of disk before they realize that kafka doesn\'t expunge expired records. But it\'s too hard to control. We can do further optimizations in another ticket - to create changelog topic with TTL retention, or if already exists, verify if it matches. But that\'s the best we can do. What are your thoughts ? \\n\\n As long term solution: \\nWe store some meta information with each key-value (preferably in the key - but this will cause log compaction to fail), so we need to think more about this in detail, but essentially a meta information as a part of the message itself. And we do a restore, we skip the ones which have expired and write a expired_key -> null, which will trigger log compaction and wipe the data out eventually. This probably needs a lot more work and thought. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14542569\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14542569_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542569&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542569\' class=\'commentdate_14542569_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 19:52\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T19:52:41+0000\'\u003e13\\/May\\/15 19:52\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\" class=\\\"user-hover\\\" rel=\\\"naveenatceg\\\"\u003enaveenatceg\u003c\\/a\u003e, could you take care of Mohamed Mahmoud (El-Geish)\'s comment in RB? Guess it\'s better to resolve it before committing.\u003cbr\\/\u003e\\nThanks.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14542569_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542569&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542569\' class=\'commentdate_14542569_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 19:52\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T19:52:41+0000\'\u003e13\\/May\\/15 19:52\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e naveenatceg , could you take care of Mohamed Mahmoud (El-Geish)\'s comment in RB? Guess it\'s better to resolve it before committing. \\nThanks. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14542573\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14542573_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542573&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542573\' class=\'commentdate_14542573_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 19:54\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T19:54:10+0000\'\u003e13\\/May\\/15 19:54\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eWill do Yan!\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14542573_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542573&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542573\' class=\'commentdate_14542573_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 19:54\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T19:54:10+0000\'\u003e13\\/May\\/15 19:54\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Will do Yan! \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14542894\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14542894_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542894&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542894\' class=\'commentdate_14542894_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 23:17\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T23:17:22+0000\'\u003e13\\/May\\/15 23:17\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eCreated follow up ticket for changelog support:\u003cbr\\/\u003e\\n\u003ca href=\\\"https:\\/\\/issues.apache.org\\/jira\\/browse\\/SAMZA-677\\\" class=\\\"external-link\\\" rel=\\\"nofollow\\\"\u003ehttps:\\/\\/issues.apache.org\\/jira\\/browse\\/SAMZA-677\u003c\\/a\u003e\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14542894_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14542894&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14542894\' class=\'commentdate_14542894_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'13\\/May\\/15 23:17\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-13T23:17:22+0000\'\u003e13\\/May\\/15 23:17\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e Created follow up ticket for changelog support: \\n https:\\/\\/issues.apache.org\\/jira\\/browse\\/SAMZA-677 \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14544571\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14544571_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14544571&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14544571\' class=\'commentdate_14544571_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'14\\/May\\/15 23:07\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-14T23:07:34+0000\'\u003e14\\/May\\/15 23:07\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003e+1 from me. Also get +1 from Yi (in RB). Committed. Thank you.\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand comment\\\" title=\\\"Expand comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-collapsed\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details flooded\\\"\u003e\\n \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"closeuris\\\" id=\\\"commentauthor_14544571_concise\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=closeuris\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10442\\\" alt=\\\"closeuris\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Yan Fang\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14544571&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14544571\' class=\'commentdate_14544571_concise subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'14\\/May\\/15 23:07\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-14T23:07:34+0000\'\u003e14\\/May\\/15 23:07\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e +1 from me. Also get +1 from Yi (in RB). Committed. Thank you. \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n\u003c\\/div\u003e\\n \\n\\n\\n\u003cdiv id=\\\"comment-14544578\\\" class=\\\"issue-data-block activity-comment twixi-block expanded\\\"\u003e\\n \u003cdiv class=\\\"twixi-wrap verbose actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Collapse comment\\\" title=\\\"Collapse comment\\\" class=\\\"twixi icon-default aui-icon aui-icon-small aui-iconfont-expanded\\\"\u003e\u003c\\/button\u003e\\n \u003cdiv class=\\\"action-details\\\"\u003e \\n \\n \\n \\n \\n\\n \u003ca class=\\\"user-hover user-avatar\\\" rel=\\\"naveenatceg\\\" id=\\\"commentauthor_14544578_verbose\\\" href=\\\"\\/jira\\/secure\\/ViewProfile.jspa?name=naveenatceg\\\"\u003e\u003cspan class=\\\"aui-avatar aui-avatar-xsmall\\\"\u003e\u003cspan class=\\\"aui-avatar-inner\\\"\u003e\u003cimg src=\\\"https:\\/\\/issues.apache.org\\/jira\\/secure\\/useravatar?size=xsmall&avatarId=10452\\\" alt=\\\"naveenatceg\\\" \\/\u003e\u003c\\/span\u003e\u003c\\/span\u003e Naveen Somasundaram\u003c\\/a\u003e\\n added a comment - \u003ca href=\'\\/jira\\/browse\\/SAMZA-537?focusedCommentId=14544578&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14544578\' class=\'commentdate_14544578_verbose subText comment-created-date-link\'\u003e\u003cspan class=\'date user-tz\' title=\'14\\/May\\/15 23:09\'\u003e\u003ctime class=\'livestamp\' datetime=\'2015-05-14T23:09:12+0000\'\u003e14\\/May\\/15 23:09\u003c\\/time\u003e\u003c\\/span\u003e\u003c\\/a\u003e \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-body flooded\\\"\u003e\u003cp\u003eThanks Yan\u003c\\/p\u003e \u003c\\/div\u003e\\n \u003cdiv class=\\\"action-links action-comment-actions\\\"\u003e\\n \u003c\\/div\u003e\\n \u003c\\/div\u003e\\n \u003cdiv class=\\\"twixi-wrap concise actionContainer\\\"\u003e\\n \u003cdiv class=\\\"action-head\\\"\u003e\\n \u003cbutton aria-label=\\\"Expand 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