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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-78993] Operations Manager oplog backup creating lot of small oplog slices instead of 10MB</title>
                <link>https://jira.mongodb.org/browse/SERVER-78993</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Replica Set (3 Members) backup from operations manager to s3 oplog store is creating lot of &lt;a href=&quot;https://www.mongodb.com/docs/ops-manager/current/tutorial/manage-oplog-storage/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;oplog slices&lt;/a&gt; of very small size instead of 10MB as claimed in documentation(snapshot attached)&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Current Behaviour:&#160;For three member replica set 60 oplog slices are getting even when no data is being written.&lt;/p&gt;

&lt;p&gt;Expected Behaviour: Oplog slice should be atleast 10MB&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Ask: Is thier any parameter to set oplog block size to higher value so less number of oplogs slices are generated.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;Queries:&lt;/p&gt;

&lt;p&gt;1&amp;gt;Does op log size increase with number of replica sets with no change in data?&lt;/p&gt;

&lt;p&gt;2&amp;gt;Is their any other way oplog slice numbers being written to S3 can be reduced&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2392144">SERVER-78993</key>
            <summary>Operations Manager oplog backup creating lot of small oplog slices instead of 10MB</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</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="13202">Works as Designed</resolution>
                                        <assignee username="chris.kelly@mongodb.com">Chris Kelly</assignee>
                                    <reporter username="vasimkm@gmail.com">waseem khan</reporter>
                        <labels>
                    </labels>
                <created>Fri, 14 Jul 2023 16:02:20 +0000</created>
                <updated>Fri, 27 Oct 2023 13:51:32 +0000</updated>
                            <resolved>Tue, 8 Aug 2023 09:37:20 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>5</watches>
                                                                                                                <comments>
                            <comment id="5619541" author="evin.roesle" created="Tue, 8 Aug 2023 09:37:20 +0000"  >&lt;p&gt;This works as designed. Ops Manager sends oplog slices every minute or 10MB, whichever comes first. This is not editable. For more information please see our Ops Manager documentation, &lt;a href=&quot;https://www.mongodb.com/docs/ops-manager/current/tutorial/nav/backup-storage/&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://www.mongodb.com/docs/ops-manager/current/tutorial/nav/backup-storage/&lt;/a&gt; .&#160;&lt;/p&gt;</comment>
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                            <attachment id="462504" name="Screenshot 2023-07-14 at 9.26.50 PM.png" size="1490027" author="vasimkm@gmail.com" created="Fri, 14 Jul 2023 15:58:38 +0000"/>
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&lt;p&gt;MongDB database version: 4.4.15 enterprise&lt;/p&gt;

&lt;p&gt;1&amp;gt;Setup operations manager S3 storage to backup mongodb oplogs and snapshots.&lt;/p&gt;

&lt;p&gt;2&amp;gt;Monitor oplog slice generation and not down size when no load is running&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

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