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        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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            <title>[DOCS-464] the differences between shardconnection &amp; scopeddbconnection?</title>
                <link>https://jira.mongodb.org/browse/DOCS-464</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;   i&apos;m reading the soucrecode to figure out how mongodb works.i wonder what&apos;s the differences between shardconnection and scopeddbconnection , it seems that they get connection from different dbconnectionpools.&lt;/p&gt;</description>
                <environment>centos</environment>
        <key id="48605">DOCS-464</key>
            <summary>the differences between shardconnection &amp; scopeddbconnection?</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</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="spencer@mongodb.com">Spencer Brody</assignee>
                                    <reporter username="marv">maxun</reporter>
                        <labels>
                            <label>mongos</label>
                            <label>scourcecode</label>
                    </labels>
                <created>Thu, 30 Aug 2012 02:04:55 +0000</created>
                <updated>Mon, 30 Oct 2023 22:02:33 +0000</updated>
                            <resolved>Fri, 31 Aug 2012 01:03:55 +0000</resolved>
                                    <version>mongodb-2.2</version>
                                    <fixVersion>Server_Docs_20231030</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="158799" author="marv" created="Fri, 31 Aug 2012 01:00:26 +0000"  >&lt;p&gt;thanks for your reply.it helps a lot.&lt;/p&gt;</comment>
                            <comment id="158529" author="spencer" created="Thu, 30 Aug 2012 14:51:34 +0000"  >&lt;p&gt;The main difference is that ShardConnections maintain versioning information so it can properly handle chunk migrations.  ShardConnections are what the mongos mainly uses for running queries on the shards.  ScopedDbConnections don&apos;t keep versioning information, so they are more used for internal operations within the cluster (replication, admin commands, talking to the config servers, etc.) that don&apos;t involve querying sharded collections..&lt;/p&gt;</comment>
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