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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>[DOCS-760] Additional note for doc &quot;Perform Two Phase Commits&quot;</title>
                <link>https://jira.mongodb.org/browse/DOCS-760</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;The &quot;transaction&quot; implemented in the doc is not isolated. The committing is a group of atomic operations, so is the rollback. So all the inconsistent inner states are visible to other applications.&lt;/p&gt;

&lt;p&gt;What this implementation achieved is eventual consistency of multi documents update, but definitely not ACID.&lt;/p&gt;

&lt;p&gt;Since other applications can touch those documents while this transaction is committing and rollbacking, for fully reversible (rollback), this implementation can only support $inc operator. Because other atomic operators ($set, $pull ...) are not reversible without exclusive lock for write.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Reporter&lt;/b&gt;: Chunpeng Huo&lt;br/&gt;
&lt;b&gt;E-mail&lt;/b&gt;: &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;mailto:huochunpeng@gmail.com&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;huochunpeng@gmail.com&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.mongodb.org/images/icons/mail_small.gif&quot; height=&quot;12&quot; width=&quot;13&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;</description>
                <environment>&lt;br/&gt;
&lt;br/&gt;
*Location*: &lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/perform-two-phase-commits/&quot;&gt;http://docs.mongodb.org/manual/tutorial/perform-two-phase-commits/&lt;/a&gt;&lt;br/&gt;
*User-Agent*: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17&lt;br/&gt;
*Referrer*: &lt;a href=&quot;http://www.mongodb.org/display/DOCS/two-phase+commit&quot;&gt;http://www.mongodb.org/display/DOCS/two-phase+commit&lt;/a&gt;&lt;br/&gt;
*Screen Resolution*: 2560 x 1440&lt;br/&gt;
</environment>
        <key id="56439">DOCS-760</key>
            <summary>Additional note for doc &quot;Perform Two Phase Commits&quot;</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="9">Done</resolution>
                                        <assignee username="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="auto">auto</reporter>
                        <labels>
                            <label>collector-298ba4e7</label>
                    </labels>
                <created>Thu, 15 Nov 2012 04:34:10 +0000</created>
                <updated>Fri, 3 Nov 2017 11:23:20 +0000</updated>
                            <resolved>Thu, 15 Nov 2012 21:10:27 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="190700" author="auto" created="Thu, 15 Nov 2012 21:10:26 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;date&apos;: u&apos;2012-11-15T21:10:20Z&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-760&quot; title=&quot;Additional note for doc &amp;quot;Perform Two Phase Commits&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-760&quot;&gt;&lt;del&gt;DOCS-760&lt;/del&gt;&lt;/a&gt;: adding note about isolation in two phase commits&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/ef6068aeaa29961989dfbdb4fbd1f79587b7603f&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/ef6068aeaa29961989dfbdb4fbd1f79587b7603f&lt;/a&gt;&lt;/p&gt;</comment>
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