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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[SERVER-1226] Reconstruction of config server metadata</title>
                <link>https://jira.mongodb.org/browse/SERVER-1226</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;There should be a section in DOCS explaining on how to reconstruct the metadata of the config servers.&lt;/p&gt;

&lt;p&gt;If one looses all config servers it should be possible to reconstruct the metadata / config servers since the shards themselves know which chunks they hold. This is probably a pretty trivial task but it is not documented.&lt;br/&gt;
It probably could even be automated in a command like repairdb. &lt;/p&gt;

&lt;p&gt;If one looses one out of three config servers it should be documented if one just needs to rsync the data of the healthy config servers to a new 3rd one or if any other actions need to be taken so that metadata can recover from readonly mode.&lt;br/&gt;
This could probably also be automated in a simple repair command.&lt;/p&gt;
</description>
                <environment></environment>
        <key id="12135">SERVER-1226</key>
            <summary>Reconstruction of config server metadata</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="eliot">Eliot Horowitz</assignee>
                                    <reporter username="aliemen">Alex</reporter>
                        <labels>
                    </labels>
                <created>Sat, 12 Jun 2010 12:27:59 +0000</created>
                <updated>Sun, 4 Jul 2010 08:49:40 +0000</updated>
                            <resolved>Sat, 12 Jun 2010 12:30:56 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="14698" author="eliot" created="Sat, 12 Jun 2010 12:30:56 +0000"  >&lt;p&gt;Actually the opposite is true.&lt;br/&gt;
If every node goes down, the shards do in fact NOT know who is the owner of a given chunk.&lt;br/&gt;
This is why you need multiple config servers and they are all 2 phase commits.&lt;/p&gt;</comment>
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