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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[SERVER-2603] command to resize capped collection (offline oplog size increase)</title>
                <link>https://jira.mongodb.org/browse/SERVER-2603</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;If a mongod is started with a different oplog size, we do a full clone of the db with a new oplog size.&lt;br/&gt;
We warn the user this is slow, and ctrl-c should be safe to kill it.&lt;br/&gt;
  it just says &quot;new oplog size detected: will make a new local database.  this is a slow operation.  to abort the migration, ctrl-c and run again with your old --oplogSize of ___&quot;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="14837">SERVER-2603</key>
            <summary>command to resize capped collection (offline oplog size increase)</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="3">Duplicate</resolution>
                                        <assignee username="backlog-server-repl">Backlog - Replication Team</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
                    </labels>
                <created>Mon, 21 Feb 2011 22:03:05 +0000</created>
                <updated>Tue, 6 Dec 2022 05:45:10 +0000</updated>
                            <resolved>Thu, 8 Feb 2018 20:47:09 +0000</resolved>
                                                                    <component>Replication</component>
                    <component>Storage</component>
                                        <votes>5</votes>
                                    <watches>8</watches>
                                                                                                                <comments>
                            <comment id="183716" author="redbeard0531" created="Wed, 7 Nov 2012 20:03:02 +0000"  >&lt;p&gt;Revision to previous comment: The new plan is to add a command, tentatively invoked as: &lt;/p&gt;
{resizedCappedCollection:COLLECTION_NAME, size:NEW_SIZE}
&lt;p&gt;. For now it will only support growing a collection and will error out if NEW_SIZE &amp;lt; CURRENT_SIZE &lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt;. It will move the oldest documents in the current extent to the end of the new space, meaning that the new capacity is available immediately after the commend completes and that no more documents will be aged-out from the time the command starts until the new space has been filled.&lt;/p&gt;


&lt;p&gt;&lt;span class=&quot;error&quot;&gt;&amp;#91;1&amp;#93;&lt;/span&gt; An alternative idea would be to use growTo:NEW_SIZE and possibly add a shrinkTo:NEW_SIZE latter so it is more explicit.&lt;/p&gt;</comment>
                            <comment id="182634" author="redbeard0531" created="Mon, 5 Nov 2012 19:10:15 +0000"  >&lt;p&gt;There are a few ways to go with this. My current plan is to add new extents to the collection, but not move existing data. Old documents will continue to be overwritten until the new extents are reached. This means it should be ok to run on an online server since it won&apos;t block for too long, but it does mean that it can&apos;t be used to buy more time in an emergency with a lagging member. If we decide the latter functionality is needed, it can be added later.&lt;/p&gt;</comment>
                            <comment id="31549" author="eliot" created="Mon, 9 May 2011 06:03:49 +0000"  >&lt;p&gt;Yes, timely.  YOu will have to take a slave down, but shouldn&apos;t entail downtime.&lt;/p&gt;</comment>
                            <comment id="29807" author="jason.coombs@yougov.com" created="Wed, 27 Apr 2011 03:41:57 +0000"  >&lt;p&gt;With this feature, would it be possible to grow the oplog in a timely fashion without invalidating the slaves (as the Halted Replication docs prescribe)? Even better would be a feature to grow the oplog without downtime.&lt;/p&gt;</comment>
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