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        <build-date>13-04-2023</build-date>
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            <title>[SERVER-11500] Multi-document transactions within a single shard</title>
                <link>https://jira.mongodb.org/browse/SERVER-11500</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Add ability to modify/insert/delete multiple documents that all belong to the same shard as a single transaction.&lt;/p&gt;</description>
                <environment></environment>
        <key id="96587">SERVER-11500</key>
            <summary>Multi-document transactions within a single shard</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="ron.avnur">Ron Avnur</reporter>
                        <labels>
                    </labels>
                <created>Thu, 31 Oct 2013 16:13:37 +0000</created>
                <updated>Tue, 6 Dec 2022 05:15:22 +0000</updated>
                            <resolved>Tue, 19 Jun 2018 15:50:11 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>31</votes>
                                    <watches>37</watches>
                                                                                                                <comments>
                            <comment id="1925037" author="spencer" created="Tue, 19 Jun 2018 15:50:11 +0000"  >&lt;p&gt;MongoDB 4.0 supports multi-document transactions on a single replica set.&lt;/p&gt;

&lt;p&gt;While they do not yet work in sharded clusters, sharding support for multi-document transactions is currently under development and is targeted (though not guaranteed) to be released in MongoDB 4.2.&lt;/p&gt;</comment>
                            <comment id="1472363" author="umesh" created="Mon, 9 Jan 2017 10:31:16 +0000"  >&lt;p&gt;Apart from the use case Tom mentioned, there will be many other use cases which can have all the documents participating in a Transaction reside on a single shard especially multi-tenant cloud App.....In my perspective if we have this feature in MongoDB, we can replace RDBMS for many use cases and MongoDB will be the most preferred database.&lt;br/&gt;
When can we expect this feature(multi-document transaction).&lt;/p&gt;</comment>
                            <comment id="864464" author="tk3369" created="Thu, 26 Mar 2015 00:01:31 +0000"  >&lt;p&gt;I would expect the transaction aspect would not only guarantee &quot;all or none&quot; but also support various levels of isolation.  &lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;http://en.wikipedia.org/wiki/Isolation_%28database_systems%29&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://en.wikipedia.org/wiki/Isolation_%28database_systems%29&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Having this feature can potentially open up a lot of use cases where document-oriented model is preferred but sharding isn&apos;t required due to smaller data volume.  &lt;/p&gt;</comment>
                            <comment id="808280" author="dwight_10gen" created="Tue, 20 Jan 2015 15:58:46 +0000"  >&lt;p&gt;To elaborate: the multiple documents could be in any number of collections, but are all on the same shard.  In that scenario presumably the collections presumably use the same shard key.  For example if all the orders for a customer fit on one shard, shard both the orders collection and customer collection by customer_id.&lt;/p&gt;</comment>
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