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    <title>MongoDB Jira</title>
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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-32449] GPiTR POC</title>
                <link>https://jira.mongodb.org/browse/SERVER-32449</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;This &quot;umbrella&quot; task tracks POC implementation of the Cluster-wide Snapshot Reads &lt;a href=&quot;https://goo.gl/H75DG7&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;design spec&lt;/a&gt;.&lt;br/&gt;
There will be other tasks this task will be dependent on.&lt;/p&gt;

&lt;p&gt;Below are tasks &lt;/p&gt;

&lt;p&gt;1. distribute snapshotTime. The details on getting this value on the replica set must be made available in the Local Snapshot Reads &lt;a href=&quot;https://goo.gl/22Ejps&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;design spec&lt;/a&gt;&lt;br/&gt;
2. keep track of the shard&apos;s snapshotTime on mongos per shard&lt;/p&gt;

&lt;p&gt;3. keep track of the open &quot;read-only&quot; transaction on mongos so the multi statement reads use the same snapshot. The minimum will be the find/getMore for the cursor&lt;/p&gt;

&lt;p&gt;4. implement the logic to buffer the data before all shards confirm that they can establish snapshot - look how the SSV is currently handled.&lt;br/&gt;
5. handle SnapshotUnavailable, SnapshotTooOld errors similar to SSV to restart the snapshot establish process.&lt;/p&gt;
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                <environment></environment>
        <key id="475405">SERVER-32449</key>
            <summary>GPiTR POC</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="13201">Fixed</resolution>
                                        <assignee username="misha.tyulenev@mongodb.com">Misha Tyulenev</assignee>
                                    <reporter username="misha.tyulenev@mongodb.com">Misha Tyulenev</reporter>
                        <labels>
                    </labels>
                <created>Thu, 21 Dec 2017 20:40:03 +0000</created>
                <updated>Mon, 30 Oct 2023 23:09:43 +0000</updated>
                            <resolved>Thu, 1 Mar 2018 22:20:12 +0000</resolved>
                                                    <fixVersion>3.7.3</fixVersion>
                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1820527" author="misha.tyulenev" created="Thu, 1 Mar 2018 22:20:12 +0000"  >&lt;p&gt;This concludes the POC and begins the prod dev.&lt;br/&gt;
POC: &lt;a href=&quot;https://github.com/mikety/mongo&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mikety/mongo&lt;/a&gt; &lt;br/&gt;
contains the changes that allow to run the snapshot read against sharded DB. per jstests/sharding/snapshot_cluster_reads.js&lt;/p&gt;</comment>
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