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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-29716] Keystring-encode ResumeTokens to allow bytewise comparisons</title>
                <link>https://jira.mongodb.org/browse/SERVER-29716</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Change notification ResumeTokens are composed of the logical time timestamp, the fully qualified collection name, and the document key of the changed document.  In the initial version, these three components will just be fields of a BSON object, and comparisons inside the server for relative ordering will use BSON&apos;s woCompare() function.  If instead we keystring-encoded that document, then the ResumeTokens become truly opaque blobs which forces users and drivers not to rely on their current format or try to inspect them.  It also could give us a performance win since now the internal comparisons the server must do to put notifications in order can be bytewise comparisons instead of needing woCompare().&lt;/p&gt;</description>
                <environment></environment>
        <key id="395725">SERVER-29716</key>
            <summary>Keystring-encode ResumeTokens to allow bytewise comparisons</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="13201">Fixed</resolution>
                                        <assignee username="matthew.russotto@mongodb.com">Matthew Russotto</assignee>
                                    <reporter username="spencer@mongodb.com">Spencer Brody</reporter>
                        <labels>
                    </labels>
                <created>Mon, 19 Jun 2017 19:09:47 +0000</created>
                <updated>Mon, 30 Oct 2023 23:15:56 +0000</updated>
                            <resolved>Mon, 9 Oct 2017 17:05:07 +0000</resolved>
                                                    <fixVersion>3.6.0-rc0</fixVersion>
                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>6</watches>
                                                                                                                <comments>
                            <comment id="1693263" author="xgen-internal-githook" created="Mon, 9 Oct 2017 17:04:57 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29716&quot; title=&quot;Keystring-encode ResumeTokens to allow bytewise comparisons&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29716&quot;&gt;&lt;del&gt;SERVER-29716&lt;/del&gt;&lt;/a&gt; Fix unittests for ARM (signed vs unsigned char)&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c906f6357d22f66d58e3334868025069c62bd97b&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c906f6357d22f66d58e3334868025069c62bd97b&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1692926" author="matthew.russotto" created="Mon, 9 Oct 2017 14:17:36 +0000"  >&lt;p&gt;Reopening to fix issue with unittests on ARM&lt;/p&gt;</comment>
                            <comment id="1690229" author="matthew.russotto" created="Thu, 5 Oct 2017 14:25:20 +0000"  >&lt;p&gt;This relaxes the requirements on the drivers to return the resume token in the same order and with the same UUID format as it is sent from the server. &lt;/p&gt;</comment>
                            <comment id="1690224" author="xgen-internal-githook" created="Thu, 5 Oct 2017 14:23:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;email&apos;: &apos;matthew.russotto@10gen.com&apos;, &apos;name&apos;: &apos;Matthew Russotto&apos;, &apos;username&apos;: &apos;mtrussotto&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-29716&quot; title=&quot;Keystring-encode ResumeTokens to allow bytewise comparisons&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-29716&quot;&gt;&lt;del&gt;SERVER-29716&lt;/del&gt;&lt;/a&gt; Keystring-encode ResumeTokens to allow bytewise comparisons&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/316a341735b2ffd12ee203581ac0f736a6aaef88&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/316a341735b2ffd12ee203581ac0f736a6aaef88&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="1677871" author="spencer" created="Wed, 20 Sep 2017 17:17:23 +0000"  >&lt;p&gt;Turns out this is required to work around the fact that some drivers don&apos;t preserve field ordering of BSON objects, and thus could re-order the shard key in the resumeToken, which would prevent resumability from working properly.&lt;/p&gt;</comment>
                            <comment id="1601028" author="spencer" created="Mon, 19 Jun 2017 19:10:12 +0000"  >&lt;p&gt;This ticket is a nice-to-have and shouldn&apos;t be considered a requirement to complete the change notification project.&lt;/p&gt;</comment>
                    </comments>
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