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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-7544] Support priorities (like rs nodes) to control being balancer</title>
                <link>https://jira.mongodb.org/browse/SERVER-7544</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Hello,&lt;br/&gt;
I would like to request new feature in cluster environment - ability to specify new BalancerHost during sh.startBalancer().&lt;/p&gt;

&lt;p&gt;For example, I have cluster made of number of replicaSets. Each replicaSet have backup servers inside, with priority 0 in order to do only backup job. &lt;/p&gt;

&lt;p&gt;It would be also nice idea to make priority levels also working for electing as BalancerHost in the cluster instead of specifying exact Balancers.&lt;/p&gt;

&lt;p&gt;Thank you,&lt;br/&gt;
Maxim&lt;/p&gt;</description>
                <environment></environment>
        <key id="55126">SERVER-7544</key>
            <summary>Support priorities (like rs nodes) to control being balancer</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</type>
                                            <priority id="2" iconUrl="https://jira.mongodb.org/images/icons/priorities/critical.svg">Critical - P2</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="backlog-server-sharding">[DO NOT USE] Backlog - Sharding Team</assignee>
                                    <reporter username="maxim">Maxim Fedchyshyn</reporter>
                        <labels>
                            <label>balancer</label>
                            <label>cluster</label>
                            <label>mongos</label>
                    </labels>
                <created>Fri, 2 Nov 2012 18:38:23 +0000</created>
                <updated>Tue, 6 Dec 2022 05:27:52 +0000</updated>
                            <resolved>Thu, 19 Apr 2018 18:36:46 +0000</resolved>
                                                                    <component>Sharding</component>
                                        <votes>0</votes>
                                    <watches>3</watches>
                                                                                                                <comments>
                            <comment id="1869163" author="greg.mckeon" created="Thu, 19 Apr 2018 18:36:46 +0000"  >&lt;p&gt;The balancer now runs on the config server, so this has gone away.&lt;/p&gt;</comment>
                            <comment id="307081" author="maxim" created="Fri, 5 Apr 2013 20:41:01 +0000"  >&lt;p&gt;Can we change ticket&apos;s status to &quot;Waiting for bug fix&quot;?&lt;/p&gt;

&lt;p&gt;Thank you,&lt;br/&gt;
Maxim&lt;/p&gt;</comment>
                            <comment id="182050" author="maxim" created="Fri, 2 Nov 2012 19:04:40 +0000"  >&lt;p&gt;I would better say, I want priorities for cluster balancing election between mongos working the same way as priorities in replicaSets between mongod.&lt;br/&gt;
It would allow to specify which mongos instance would be elected as balancer, which would be elected in case of previous node failure, and which wouldn&apos;t be elected at all.&lt;/p&gt;
</comment>
                            <comment id="182044" author="scotthernandez" created="Fri, 2 Nov 2012 19:01:00 +0000"  >&lt;p&gt;Would it be fair to say that you want a mongos instance that won&apos;t act as a balancer at all for that use?&lt;/p&gt;</comment>
                            <comment id="182040" author="maxim" created="Fri, 2 Nov 2012 18:56:28 +0000"  >&lt;p&gt;No, there is any performance issues.&lt;br/&gt;
IT is mostly organizing and structuring issue, where I would like to see hosts doing exact job they were provisioned to and not involved into any other activity.&lt;/p&gt;</comment>
                            <comment id="182037" author="scotthernandez" created="Fri, 2 Nov 2012 18:52:33 +0000"  >&lt;p&gt;The balancer doesn&apos;t actually move the data so there shouldn&apos;t be much io, nor cpu to act as the balancer. Is there a performance issue when the balancer runs on the backup node?&lt;/p&gt;</comment>
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