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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>[SERVER-4663] mongodump performance</title>
                <link>https://jira.mongodb.org/browse/SERVER-4663</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;replication member is using mongodump command to backup database collections one at time and then transport them to another site for DR. The mongodump process takes so long that it places the replication server hours behind in replication. Replication doesn&apos;t catch up before the next night&apos;s backup kicks off, which creates a slowdown during the backup until disk activity maxes out and backups and replication grind to a halt. &lt;/p&gt;

&lt;p&gt;What can we do to improve dump performance?&lt;br/&gt;
What is our best option for performing backups in EC2?&lt;br/&gt;
Should we be setting up our drives differently?&lt;/p&gt;</description>
                <environment>EC2 2.4 server replication member on amazon Linux AMI.</environment>
        <key id="28149">SERVER-4663</key>
            <summary>mongodump performance</summary>
                <type id="6" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14720&amp;avatarType=issuetype">Question</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="4">Incomplete</resolution>
                                        <assignee username="scotthernandez">Scott Hernandez</assignee>
                                    <reporter username="tcarpenter@woot.com">Theo Carpenter</reporter>
                        <labels>
                            <label>backup</label>
                            <label>replication</label>
                    </labels>
                <created>Wed, 11 Jan 2012 21:15:26 +0000</created>
                <updated>Wed, 15 Aug 2012 14:24:18 +0000</updated>
                            <resolved>Wed, 11 Apr 2012 17:42:04 +0000</resolved>
                                    <version>2.0.1</version>
                                                    <component>Replication</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="79309" author="scotthernandez" created="Thu, 12 Jan 2012 11:09:48 +0000"  >&lt;p&gt;Can you try using the --forceTableScan flag? &lt;a href=&quot;http://www.mongodb.org/display/DOCS/Import+Export+Tools#ImportExportTools-PerformanceTips&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://www.mongodb.org/display/DOCS/Import+Export+Tools#ImportExportTools-PerformanceTips&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;What does mongostat/iostat -xm 2 look like during the backup process?&lt;/p&gt;

&lt;p&gt;If you have less then 1TB of data, and replication can keep up, then you can use a single EBS on a special backup replica which is hidden to allow you to use EBS snapshots without having to synchronize the process across multiple EBS volumes.&lt;/p&gt;

&lt;p&gt;What is your disk configuration now?&lt;/p&gt;</comment>
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