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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-69626] FLE2 Compact - delete from ESC not in a transaction</title>
                <link>https://jira.mongodb.org/browse/SERVER-69626</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If the ESC table has N rows, the N-1 rows should be deleted with a delete that is not in a MongoDB user transaction. Normally, all of the ESC operations run in &lt;tt&gt;SyncTransactionWithRetries::runNoThrow&lt;/tt&gt;` which means they run in a TXN. Due to the large number of ESC rows that must be deleted this could create a very large txn, the deletes should instead happen with a delete that does not run as part of the transaction. &lt;/p&gt;

&lt;p&gt;1. Extend FLEQueryInterfaceImpl with a new delete method&lt;br/&gt;
See FLEQueryInterfaceImpl::countDocuments for example of how this can be done with DBDirectClient&lt;br/&gt;
2. Change ESC deletes to use this new method for all but the highest ESC record.&lt;/p&gt;

&lt;p&gt;Note: ECC deletes remain under the txn. Also, the ESC null document update remains under the TXN.&lt;/p&gt;</description>
                <environment></environment>
        <key id="2135177">SERVER-69626</key>
            <summary>FLE2 Compact - delete from ESC not in a transaction</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="12300">Won&apos;t Do</resolution>
                                        <assignee username="backlog-server-security">Backlog - Security Team</assignee>
                                    <reporter username="mark.benvenuto@mongodb.com">Mark Benvenuto</reporter>
                        <labels>
                    </labels>
                <created>Tue, 13 Sep 2022 14:55:41 +0000</created>
                <updated>Wed, 29 Mar 2023 16:15:53 +0000</updated>
                            <resolved>Wed, 29 Mar 2023 16:15:53 +0000</resolved>
                                                                    <component>Queryable Encryption</component>
                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5309572" author="JIRAUSER1261316" created="Wed, 29 Mar 2023 16:15:53 +0000"  >&lt;p&gt;This work has been superseded by the v2 compaction algorithm in OST-1 v6, which was implemented in &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-72936&quot; title=&quot;Implement v2 changes to Queryable Encryption Compact&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-72936&quot;&gt;&lt;del&gt;SERVER-72936&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="4899242" author="mark.benvenuto" created="Wed, 12 Oct 2022 20:34:56 +0000"  >&lt;p&gt;After some more consideration, we need to be a little careful such the changes to ESC are sequenced correctly in relation to the EmuBinary.&lt;/p&gt;

&lt;p&gt;The new proposed algorithm with ESC non-transactional deletes is below. The algorithm is the same as the originally but the order of operations is sequenced differently. Within ESC and ECC, the order of how the null record and non-null records.&lt;/p&gt;

&lt;ol&gt;
	&lt;li&gt;Start TXN T1&lt;/li&gt;
	&lt;li&gt;Read ESC&lt;/li&gt;
	&lt;li&gt;Update ESC null document (This must be updated before the non-txn deletes occur)&lt;/li&gt;
	&lt;li&gt;Commit T1&lt;/li&gt;
	&lt;li&gt;Non-transactionally delete all other ESC documents&lt;/li&gt;
	&lt;li&gt;Start TXN T2&lt;/li&gt;
	&lt;li&gt;Do ECC compaction as-is&lt;/li&gt;
	&lt;li&gt;Commit T2&lt;/li&gt;
&lt;/ol&gt;
</comment>
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