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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-26666] OplogBufferCollection should save sentinels in collection</title>
                <link>https://jira.mongodb.org/browse/SERVER-26666</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Instead of maintaining a vector of the sentinel values in memory, OplogBufferCollection should store sentinels on disk. The _id field format would be changed from:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;to:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;Where i is the number of sentinels with the same timestamp &amp;lt;Timestamp&amp;gt;.&lt;/p&gt;

&lt;p&gt;This change would improve readability and make it easier to implement batched reads from the collection in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26191&quot; title=&quot;OplogBufferCollection should batch reads from collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26191&quot;&gt;&lt;del&gt;SERVER-26191&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="324281">SERVER-26666</key>
            <summary>OplogBufferCollection should save sentinels in collection</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="9">Done</resolution>
                                        <assignee username="benety.goh@mongodb.com">Benety Goh</assignee>
                                    <reporter username="benety.goh@mongodb.com">Benety Goh</reporter>
                        <labels>
                    </labels>
                <created>Mon, 17 Oct 2016 19:30:27 +0000</created>
                <updated>Wed, 25 Jan 2017 21:57:46 +0000</updated>
                            <resolved>Fri, 21 Oct 2016 23:29:38 +0000</resolved>
                                                    <fixVersion>3.4.0-rc2</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1414944" author="xgen-internal-githook" created="Fri, 21 Oct 2016 23:29:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26666&quot; title=&quot;OplogBufferCollection should save sentinels in collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26666&quot;&gt;&lt;del&gt;SERVER-26666&lt;/del&gt;&lt;/a&gt; OplogBufferCollection saves sentinels in collection&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/9700b08a0cfaafaca6bac9efa5f188b0acf0f464&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/9700b08a0cfaafaca6bac9efa5f188b0acf0f464&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1414763" author="xgen-internal-githook" created="Fri, 21 Oct 2016 19:10:24 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26666&quot; title=&quot;OplogBufferCollection should save sentinels in collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26666&quot;&gt;&lt;del&gt;SERVER-26666&lt;/del&gt;&lt;/a&gt; added sentinel support to addIdToDocument&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/ff45562f1578bd6f2ad55c85f9c4b69dd2887130&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/ff45562f1578bd6f2ad55c85f9c4b69dd2887130&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1414730" author="xgen-internal-githook" created="Fri, 21 Oct 2016 18:19:09 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;benety&apos;, u&apos;name&apos;: u&apos;Benety Goh&apos;, u&apos;email&apos;: u&apos;benety@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-26666&quot; title=&quot;OplogBufferCollection should save sentinels in collection&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-26666&quot;&gt;&lt;del&gt;SERVER-26666&lt;/del&gt;&lt;/a&gt; store key of last popped document&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/73a5487793df760bc2fd1f5d02340716c41d217f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/73a5487793df760bc2fd1f5d02340716c41d217f&lt;/a&gt;&lt;/p&gt;</comment>
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