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            <title>[SERVER-3390] Forground Index Building shouldn&apos;t block readers</title>
                <link>https://jira.mongodb.org/browse/SERVER-3390</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Someone claims that PostgreSQL does this: &lt;a href=&quot;http://news.ycombinator.com/item?id=2737919&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://news.ycombinator.com/item?id=2737919&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;I think we can do this as well as long as we don&apos;t add any global references to the index until it is ready, or just mark it as not ready until it is. This probably depends on upgradable locks but I couldn&apos;t find a jira for that.&lt;/p&gt;</description>
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        <key id="19243">SERVER-3390</key>
            <summary>Forground Index Building shouldn&apos;t block readers</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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-execution">Backlog - Storage Execution Team</assignee>
                                    <reporter username="mathias@mongodb.com">Mathias Stearn</reporter>
                        <labels>
                    </labels>
                <created>Thu, 7 Jul 2011 18:49:13 +0000</created>
                <updated>Tue, 6 Dec 2022 05:42:23 +0000</updated>
                            <resolved>Wed, 30 Nov 2016 21:28:56 +0000</resolved>
                                                                    <component>Concurrency</component>
                    <component>Index Maintenance</component>
                                        <votes>2</votes>
                                    <watches>3</watches>
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                            <comment id="1446283" author="milkie" created="Wed, 30 Nov 2016 21:28:56 +0000"  >&lt;p&gt;follow &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-18301&quot; title=&quot;Allow reads during foreground index builds&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-18301&quot;&gt;&lt;del&gt;SERVER-18301&lt;/del&gt;&lt;/a&gt; for updates&lt;/p&gt;</comment>
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