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            <title>[SERVER-511] &quot;hash&quot; index</title>
                <link>https://jira.mongodb.org/browse/SERVER-511</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;hash keys in btree to 10 bytes&lt;br/&gt;
the can used fixed width btree&lt;/p&gt;

&lt;p&gt;it may be bettter to just make hash keys more compressed / efficient instead.&lt;/p&gt;</description>
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        <key id="11057">SERVER-511</key>
            <summary>&quot;hash&quot; index</summary>
                <type id="2" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14711&amp;avatarType=issuetype">New Feature</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="backlog-server-query">Backlog - Query Team</assignee>
                                    <reporter username="eliot">Eliot Horowitz</reporter>
                        <labels>
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                <created>Thu, 31 Dec 2009 12:48:19 +0000</created>
                <updated>Tue, 6 Dec 2022 05:51:00 +0000</updated>
                            <resolved>Fri, 8 Feb 2019 18:56:27 +0000</resolved>
                                                                    <component>Index Maintenance</component>
                                        <votes>7</votes>
                                    <watches>7</watches>
                                                                                                                <comments>
                            <comment id="2142817" author="brian.lane" created="Fri, 8 Feb 2019 18:56:16 +0000"  >&lt;p&gt;Closing this as won&apos;t fix for now.&lt;/p&gt;

&lt;p&gt;-Brian&lt;/p&gt;</comment>
                            <comment id="21212" author="plasma" created="Thu, 9 Dec 2010 01:17:21 +0000"  >&lt;p&gt;MySQL can do prefix compression of keys as a way to shrink the size of indexes (especially on compound indexes), see &lt;a href=&quot;http://dev.mysql.com/doc/refman/5.0/en/key-space.html&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://dev.mysql.com/doc/refman/5.0/en/key-space.html&lt;/a&gt; for more info, which may be a suitable alternative.&lt;/p&gt;</comment>
                            <comment id="11571" author="dwight_10gen" created="Thu, 31 Dec 2009 12:51:13 +0000"  >&lt;p&gt;this would not support range queries (just lookups of a particular value), but might then take half the ram and half the cpu&lt;/p&gt;</comment>
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