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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>[DOCS-1212] Mention the bug related to Linux, xfs and rsync on /manual/administration/backups/ page</title>
                <link>https://jira.mongodb.org/browse/DOCS-1212</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;In relation of the bug &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-8518&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://jira.mongodb.org/browse/SERVER-8518&lt;/a&gt; I&apos;m proposing a following note to the page &lt;a href=&quot;http://docs.mongodb.org/manual/administration/backups/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://docs.mongodb.org/manual/administration/backups/&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;-------&lt;br/&gt;
Nearly all Linux kernel versions up to 2.6.32 suffers a bug &lt;a href=&quot;https://bugzilla.kernel.org/show_bug.cgi?id=2645&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://bugzilla.kernel.org/show_bug.cgi?id=2645&lt;/a&gt; which in some cases delays the mtime (modification timestamp) update for the mongodb data files when using the XFS filesystem. Also other filesystems might be affected in older Linux versions. This delay might cause rsync to ignore some data files if rsync is used to make backups.&lt;/p&gt;

&lt;p&gt;You can verify if you might be affected by this bug by compiling and running this test script &lt;a href=&quot;https://bugzilla.kernel.org/attachment.cgi?id=14430&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://bugzilla.kernel.org/attachment.cgi?id=14430&lt;/a&gt; &lt;/p&gt;

&lt;p&gt;Always remember to test and practice backup recovery, so you can be sure you have a working backup method. &lt;/p&gt;</description>
                <environment></environment>
        <key id="67737">DOCS-1212</key>
            <summary>Mention the bug related to Linux, xfs and rsync on /manual/administration/backups/ page</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="5" iconUrl="https://jira.mongodb.org/images/icons/priorities/trivial.svg">Trivial - P5</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="garo">Juho M&#228;kinen</reporter>
                        <labels>
                    </labels>
                <created>Fri, 8 Mar 2013 07:25:24 +0000</created>
                <updated>Mon, 30 Oct 2023 22:40:53 +0000</updated>
                            <resolved>Sat, 7 Feb 2015 02:00:19 +0000</resolved>
                                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>Server</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="287000" author="garo" created="Tue, 12 Mar 2013 08:44:38 +0000"  >&lt;p&gt;No. The --ignore-times will basically make the rsync to crawl thru all files (just as --checksum), which will severely hurt the restoration performance. For example in my case the process took about four hours on a dataset of 180GB, which you don&apos;t want to wait when you&apos;re restoring your critical service from backups.&lt;/p&gt;</comment>
                            <comment id="286747" author="samk" created="Mon, 11 Mar 2013 23:27:21 +0000"  >&lt;p&gt;Is the &amp;#45;I (&amp;#45;&amp;#45;ignore-times) option to rsync a viable work around for this issue?&lt;/p&gt;</comment>
                            <comment id="284072" author="garo" created="Fri, 8 Mar 2013 07:36:53 +0000"  >&lt;p&gt;Also a link can be added to my blog post explaining the details of this issue: &lt;a href=&quot;http://www.juhonkoti.net/2013/03/06/snapshot-recovery-problems-with-mongodb-mmap-xfs-filesystem-and-rsync&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.juhonkoti.net/2013/03/06/snapshot-recovery-problems-with-mongodb-mmap-xfs-filesystem-and-rsync&lt;/a&gt;&lt;/p&gt;</comment>
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