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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-1829] Initial replica set sync should clone from secondary </title>
                <link>https://jira.mongodb.org/browse/SERVER-1829</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;When you add a new member to a replica set (or need to resync an existing member), it clones the data from the primary. This causes a performance impact. Instead, it would be better if the initial clone was take from a secondary so only the catchup running through the oplog need take place on the primary.&lt;/p&gt;</description>
                <environment></environment>
        <key id="13150">SERVER-1829</key>
            <summary>Initial replica set sync should clone from secondary </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="9">Done</resolution>
                                        <assignee username="kristina">Kristina Chodorow</assignee>
                                    <reporter username="boxedice">David Mytton</reporter>
                        <labels>
                    </labels>
                <created>Wed, 22 Sep 2010 16:54:41 +0000</created>
                <updated>Tue, 12 Jul 2016 00:17:52 +0000</updated>
                            <resolved>Wed, 8 Dec 2010 20:04:44 +0000</resolved>
                                                    <fixVersion>1.7.4</fixVersion>
                                    <component>Replication</component>
                                        <votes>1</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="20426" author="auto" created="Wed, 17 Nov 2010 23:30:42 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;kchodorow&apos;, &apos;name&apos;: &apos;Kristina Chodorow&apos;, &apos;email&apos;: &apos;kristina@10gen.com&apos;}
&lt;p&gt;Message: lots of options for initial sync &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1829&quot; title=&quot;Initial replica set sync should clone from secondary &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1829&quot;&gt;&lt;del&gt;SERVER-1829&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
/mongodb/mongo/commit/05218bfa2730d6c0aff8f84aeb46139b928703e5&lt;/p&gt;</comment>
                            <comment id="20191" author="auto" created="Tue, 9 Nov 2010 22:29:37 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;login&apos;: &apos;kchodorow&apos;, &apos;name&apos;: &apos;Kristina Chodorow&apos;, &apos;email&apos;: &apos;kristina@10gen.com&apos;}
&lt;p&gt;Message: allow initial sync from secondaries &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-1829&quot; title=&quot;Initial replica set sync should clone from secondary &quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-1829&quot;&gt;&lt;del&gt;SERVER-1829&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
/mongodb/mongo/commit/2683812ba8b59cc73db0c9826444cdc2b3fdc19d&lt;/p&gt;</comment>
                            <comment id="20054" author="dwight_10gen" created="Fri, 5 Nov 2010 15:09:10 +0000"  >&lt;p&gt;kristina maybe you can do this one - although we have some other things to do first...&lt;/p&gt;</comment>
                            <comment id="20053" author="dwight_10gen" created="Fri, 5 Nov 2010 15:08:31 +0000"  >&lt;p&gt;agreed.  we will do that in the future.&lt;/p&gt;

&lt;p&gt;a workaround for now would be to start the new member with a complete set of datafiles from a backup from an existing set member.  then it will start from what it has.  I have not tried this recently, it is possible it will &quot;complain&quot; at first that it isn&apos;t a member of the set (as it will start before being added) but other than that possibility, it would work fine, as there is nothing in the datafiles unique to a particular member the way replica sets are designed.&lt;/p&gt;
</comment>
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