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    <title>MongoDB Jira</title>
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    <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>[SERVER-51530] mongomirror should periodically tail oplog between index builds</title>
                <link>https://jira.mongodb.org/browse/SERVER-51530</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;We recently tried to copy our DB to Atlas using mongomirror.&lt;/p&gt;

&lt;p&gt;mongomirror has three phases:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;copy the collection snapshots&lt;/li&gt;
	&lt;li&gt;build indexes&lt;/li&gt;
	&lt;li&gt;tail the oplog for updates since step 1 completed&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;In our case, it took 48h for step 2 (index build) to complete, and our oplog only had 22h worth of data. When we reached step 3 (after waiting 2 days!) the tool could not proceed.&lt;/p&gt;

&lt;p&gt;It would be better if the tool could inter-mix steps 2 and 3, i.e. tail the oplog each 1 hour between index builds to stay current. This would potentially save a lot of heartbreak for users in the future.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1513817">SERVER-51530</key>
            <summary>mongomirror should periodically tail oplog between index builds</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="13204">Community Answered</resolution>
                                        <assignee username="backlog-server-triage">Backlog - Triage Team</assignee>
                                    <reporter username="johnny.shields@gmail.com">Johnny Shields</reporter>
                        <labels>
                    </labels>
                <created>Wed, 14 Oct 2020 11:24:18 +0000</created>
                <updated>Fri, 27 Oct 2023 15:56:29 +0000</updated>
                            <resolved>Thu, 15 Oct 2020 06:03:04 +0000</resolved>
                                                                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="3445633" author="dmitry.agranat" created="Thu, 15 Oct 2020 06:02:27 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=johnny.shields%40gmail.com&quot; class=&quot;user-hover&quot; rel=&quot;johnny.shields@gmail.com&quot;&gt;johnny.shields@gmail.com&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;The SERVER project is for bugs and feature suggestions for the MongoDB server. To inform our Atlas team of issues you are having or feature requests you&apos;d like to suggest, please reach out to the Atlas support team via Intercom. You can do this by clicking the round green button at the bottom right of the cluster view page in Atlas.&lt;/p&gt;

&lt;p&gt;Regards,&lt;br/&gt;
Dima&lt;/p&gt;</comment>
                            <comment id="3445083" author="JIRAUSER1257177" created="Wed, 14 Oct 2020 20:20:53 +0000"  >&lt;p&gt;Just one correction, the sequence appears to be:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;copy the collection snapshots&lt;/li&gt;
	&lt;li&gt;tail the oplog for updates since step 1 began&lt;/li&gt;
	&lt;li&gt;build indexes&lt;/li&gt;
	&lt;li&gt;tail the oplog for updates since step 3 began&lt;/li&gt;
&lt;/ol&gt;
</comment>
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