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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <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-5710] Update backup procedure for WiredTiger (via filesystem)</title>
                <link>https://jira.mongodb.org/browse/DOCS-5710</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;There are conflicting statements in the docs for backups regarding WiredTiger.&lt;/p&gt;

&lt;p&gt;This page references db.fsyncLock() and db.fsyncUnlock():&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/tutorial/backup-sharded-cluster-with-filesystem-snapshots/#if-necessary-lock-one-secondary-member-of-each-replica-set-in-each-shard&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/tutorial/backup-sharded-cluster-with-filesystem-snapshots/#if-necessary-lock-one-secondary-member-of-each-replica-set-in-each-shard&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;But when you dig further into db.fsyncLock for WiredTiger:&lt;br/&gt;
&lt;a href=&quot;http://docs.mongodb.org/manual/reference/method/db.fsyncLock/#compatibility-with-wiredtiger&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/reference/method/db.fsyncLock/#compatibility-with-wiredtiger&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;&quot;With WiredTiger the db.fsyncLock() and db.fsyncUnlock() operations cannot guarantee that the data files do not change. As a result, do not use these methods to ensure consistency for the purposes of creating backups.&quot;&lt;/p&gt;

&lt;p&gt;We should outline the exact procedure for a filesystem backup with WiredTiger, this is pretty heavily referenced in training/consulting.&lt;/p&gt;</description>
                <environment></environment>
        <key id="212601">DOCS-5710</key>
            <summary>Update backup procedure for WiredTiger (via filesystem)</summary>
                <type id="5" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14716&amp;avatarType=issuetype">Sub-task</type>
                            <parent id="185670">DOCS-4856</parent>
                                    <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="kay.kim@mongodb.com">Kay Kim</assignee>
                                    <reporter username="jason.zucchetto">Jason Zucchetto</reporter>
                        <labels>
                    </labels>
                <created>Tue, 23 Jun 2015 23:16:36 +0000</created>
                <updated>Wed, 11 Jan 2017 22:34:21 +0000</updated>
                            <resolved>Thu, 29 Oct 2015 19:06:05 +0000</resolved>
                                                    <fixVersion>01112017-cleanup</fixVersion>
                                        <due></due>
                            <votes>0</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="1074443" author="xgen-internal-githook" created="Thu, 29 Oct 2015 18:35:05 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;kay-kim&apos;, u&apos;name&apos;: u&apos;kay&apos;, u&apos;email&apos;: u&apos;kay.kim@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5074&quot; title=&quot;Comment on: &amp;quot;manual/tutorial/manage-journaling.txt&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5074&quot;&gt;&lt;del&gt;DOCS-5074&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5039&quot; title=&quot;Comment on: &amp;quot;manual/core/journaling.txt&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5039&quot;&gt;&lt;del&gt;DOCS-5039&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-6350&quot; title=&quot;Add warning about changing wiredTigerCacheSizeGB&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-6350&quot;&gt;&lt;del&gt;DOCS-6350&lt;/del&gt;&lt;/a&gt; WT storage engine and journaling&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5710&quot; title=&quot;Update backup procedure for WiredTiger (via filesystem)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5710&quot;&gt;&lt;del&gt;DOCS-5710&lt;/del&gt;&lt;/a&gt; &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5604&quot; title=&quot;Comment on: &amp;quot;manual/core/replica-set-hidden-member.txt&amp;quot;&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5604&quot;&gt;&lt;del&gt;DOCS-5604&lt;/del&gt;&lt;/a&gt; WT and fsynclock&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-5755&quot; title=&quot;db.stats() and db.collection.stats() not updated for WT&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-5755&quot;&gt;&lt;del&gt;DOCS-5755&lt;/del&gt;&lt;/a&gt; WT stats part 1&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/128a3844e55b4aeb707ed97b5bce08d7b787ca6d&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/128a3844e55b4aeb707ed97b5bce08d7b787ca6d&lt;/a&gt;&lt;/p&gt;</comment>
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            <issuekey id="209996">DOCS-5604</issuekey>
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