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    <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-28450] Implement shell support for causally consistent sessions</title>
                <link>https://jira.mongodb.org/browse/SERVER-28450</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Build a minimal viable implementation of causally consistent shell sessions that can be used for testing the causal consistency. &lt;br/&gt;
Notes:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;the user session is based on the DB session.&lt;/li&gt;
	&lt;li&gt;the property of causal consistent reads belongs to the session and can be explicitly turned on /off by a user&lt;/li&gt;
	&lt;li&gt;if the consistent reads are &quot;on&quot; the DB the session or db object keep track of the
	&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
		&lt;li&gt;clusterTime&lt;/li&gt;
		&lt;li&gt;operationTime&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;db object modifies the requests (i.e commands) by adding the $logicalTime and readConsern: afterClusterTime: &amp;lt;currentIOperationTime&amp;gt;&lt;/li&gt;
	&lt;li&gt;there is a mongo shell parameter that allows to make the causal consistency default on the start so it can be used for creating passthrough tests that run existing integration&lt;/li&gt;
	&lt;li&gt;mongo can be started with a port or connection string. In all cases it may be possible to implement the logic in the dbclient or dbclient_rs (investigate)&lt;/li&gt;
&lt;/ul&gt;

</description>
                <environment></environment>
        <key id="367343">SERVER-28450</key>
            <summary>Implement shell support for causally consistent sessions</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="misha.tyulenev@mongodb.com">Misha Tyulenev</assignee>
                                    <reporter username="misha.tyulenev@mongodb.com">Misha Tyulenev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 23 Mar 2017 16:56:27 +0000</created>
                <updated>Wed, 6 Dec 2017 21:13:29 +0000</updated>
                            <resolved>Wed, 19 Apr 2017 19:21:17 +0000</resolved>
                                                    <fixVersion>3.5.7</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1552944" author="xgen-internal-githook" created="Wed, 19 Apr 2017 19:19:02 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;mikety&apos;, u&apos;name&apos;: u&apos;Misha Tyulenev&apos;, u&apos;email&apos;: u&apos;misha@mongodb.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-28450&quot; title=&quot;Implement shell support for causally consistent sessions&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-28450&quot;&gt;&lt;del&gt;SERVER-28450&lt;/del&gt;&lt;/a&gt; add support for causal consistency to mongo shell&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/72f19039beebcb3e087dc1efbe6fac31526d2fd0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/72f19039beebcb3e087dc1efbe6fac31526d2fd0&lt;/a&gt;&lt;/p&gt;</comment>
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