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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[DOCS-2991] Update GridFS chunk size default to 255k</title>
                <link>https://jira.mongodb.org/browse/DOCS-2991</link>
                <project id="10380" key="DOCS">Documentation</project>
                    <description>&lt;p&gt;This is being changed for 2.4.10 and 2.6.0-rc3. &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=tyler%4010gen.com&quot; class=&quot;user-hover&quot; rel=&quot;tyler@10gen.com&quot;&gt;tyler@10gen.com&lt;/a&gt;&apos;s explanation:&lt;/p&gt;

&lt;blockquote&gt;
&lt;p&gt;Now that the server uses power of 2 by default, if the default chunk size for gridfs is 256k we will almost always be throwing away some storage space. This is because if the bindata field of a chunk will occupy 256k (an exact power of 2), then _id and foreign key reference to the files collection, etc will take up additional space that will cause the document&apos;s allocated storage to be rounded up to 512k (the next power of 2). This would be a huge waste.&lt;/p&gt;

&lt;p&gt;Instead, if we make the default chunk size 255k then we have an extra 1k to store the _id and other metadata so that when the document is persisted we round up to 256k and not 512k upon persisting the document.&lt;/p&gt;&lt;/blockquote&gt;</description>
                <environment></environment>
        <key id="127367">DOCS-2991</key>
            <summary>Update GridFS chunk size default to 255k</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="sam.kleinman">Sam Kleinman</assignee>
                                    <reporter username="jmikola@mongodb.com">Jeremy Mikola</reporter>
                        <labels>
                            <label>sprint-slipstream</label>
                    </labels>
                <created>Mon, 24 Mar 2014 22:38:22 +0000</created>
                <updated>Wed, 4 Mar 2015 21:24:29 +0000</updated>
                            <resolved>Tue, 1 Apr 2014 20:21:28 +0000</resolved>
                                                    <fixVersion>v1.3.3</fixVersion>
                                    <component>manual</component>
                        <due></due>
                            <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="531520" author="xgen-internal-githook" created="Tue, 1 Apr 2014 20:15:25 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2991&quot; title=&quot;Update GridFS chunk size default to 255k&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2991&quot;&gt;&lt;del&gt;DOCS-2991&lt;/del&gt;&lt;/a&gt;: changes to gridfs chunk size&lt;br/&gt;
Branch: v2.4&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/31a41963506de93fa9077fc27c3b0d57bbd625f0&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/31a41963506de93fa9077fc27c3b0d57bbd625f0&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="531519" author="xgen-internal-githook" created="Tue, 1 Apr 2014 20:15:13 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{u&apos;username&apos;: u&apos;tychoish&apos;, u&apos;name&apos;: u&apos;Sam Kleinman&apos;, u&apos;email&apos;: u&apos;samk@10gen.com&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/DOCS-2991&quot; title=&quot;Update GridFS chunk size default to 255k&quot; class=&quot;issue-link&quot; data-issue-key=&quot;DOCS-2991&quot;&gt;&lt;del&gt;DOCS-2991&lt;/del&gt;&lt;/a&gt;: changes to gridfs chunk size&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/docs/commit/52712af9c36925da02ebe834fb2d87402f8e3dd5&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/docs/commit/52712af9c36925da02ebe834fb2d87402f8e3dd5&lt;/a&gt;&lt;/p&gt;</comment>
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