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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>[SERVER-36352] enable zstd compression support in MongoDB</title>
                <link>https://jira.mongodb.org/browse/SERVER-36352</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;Zstd is available in WiredTiger but cannot be configured as an option in MongoDB.  This ticket is to track this functionality&lt;/p&gt;</description>
                <environment></environment>
        <key id="579561">SERVER-36352</key>
            <summary>enable zstd compression support in MongoDB</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="13201">Fixed</resolution>
                                        <assignee username="daniel.gottlieb@mongodb.com">Daniel Gottlieb</assignee>
                                    <reporter username="asya.kamsky@mongodb.com">Asya Kamsky</reporter>
                        <labels>
                    </labels>
                <created>Mon, 30 Jul 2018 15:49:44 +0000</created>
                <updated>Sun, 29 Oct 2023 22:29:26 +0000</updated>
                            <resolved>Thu, 27 Dec 2018 19:54:52 +0000</resolved>
                                                    <fixVersion>4.1.7</fixVersion>
                                    <component>Storage</component>
                                        <votes>1</votes>
                                    <watches>14</watches>
                                                                                                                <comments>
                            <comment id="2767189" author="brian.lane" created="Tue, 28 Jan 2020 02:27:13 +0000"  >&lt;p&gt;Hi &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=bartle&quot; class=&quot;user-hover&quot; rel=&quot;bartle&quot;&gt;bartle&lt;/a&gt;,&lt;/p&gt;

&lt;p&gt;With 3.4 going EOL this month, 3.6 is the oldest version we continue to support.  At this point, 3.6 should really be getting important fixes and perf changes deemed critical enough to warrant backports.  We also didn&apos;t backport this functionality to 4.0 for one of the main reasons you have highlighted.  &lt;/p&gt;</comment>
                            <comment id="2763760" author="bartle" created="Sat, 25 Jan 2020 00:15:50 +0000"  >&lt;p&gt;Is it possible to backport this to 4.0 and 3.6?  I think we&apos;d be ok with accepting that we&apos;ll be unable to downgrade to a minor release.&lt;/p&gt;</comment>
                            <comment id="2101177" author="xgen-internal-githook" created="Thu, 27 Dec 2018 19:47:39 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;username&apos;: &apos;dgottlieb&apos;, &apos;email&apos;: &apos;daniel.gottlieb@mongodb.com&apos;, &apos;name&apos;: &apos;Daniel Gottlieb&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-36352&quot; title=&quot;enable zstd compression support in MongoDB&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-36352&quot;&gt;&lt;del&gt;SERVER-36352&lt;/del&gt;&lt;/a&gt;: Enable zstd compression on WiredTiger journal and collection files.&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/c127c60bf8517eb00520f592f436076ffdf55e3a&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/c127c60bf8517eb00520f592f436076ffdf55e3a&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="2088720" author="daniel.gottlieb@10gen.com" created="Wed, 12 Dec 2018 18:37:15 +0000"  >&lt;p&gt;That&apos;s good enough for me to proceed!&lt;/p&gt;</comment>
                            <comment id="2088715" author="brian.lane" created="Wed, 12 Dec 2018 18:33:22 +0000"  >&lt;p&gt;Since this is a new feature and we are not currently planning on backporting this, I was thinking we would document it as such stating that if you start using zstd in 4.2, you cannot downgrade to 4.0.x.  &lt;/p&gt;

&lt;p&gt;If you require to downgrade, then you would need to dump/restore.  &lt;/p&gt;

&lt;p&gt;Open to other suggestions as well though.&lt;/p&gt;</comment>
                            <comment id="2088612" author="daniel.gottlieb@10gen.com" created="Wed, 12 Dec 2018 17:24:07 +0000"  >&lt;p&gt;What&apos;s the downgrade story if a 4.0 binary comes across data files using zstd, but is incapable of reading the compressed data?&lt;/p&gt;</comment>
                            <comment id="2088570" author="brian.lane" created="Wed, 12 Dec 2018 16:55:31 +0000"  >&lt;p&gt;Hey &lt;a href=&quot;https://jira.mongodb.org/secure/ViewProfile.jspa?name=daniel.gottlieb&quot; class=&quot;user-hover&quot; rel=&quot;daniel.gottlieb&quot;&gt;daniel.gottlieb&lt;/a&gt; - now that &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-38168&quot; title=&quot;Vendor Zstandard library&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-38168&quot;&gt;&lt;del&gt;SERVER-38168&lt;/del&gt;&lt;/a&gt; has been completed can we get this patch updated and merged in?&lt;/p&gt;

&lt;p&gt;Alex had added lz4 in the latest version - but we don&apos;t want to expose that - just zstd.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10011">
                    <name>Depends</name>
                                            <outwardlinks description="depends on">
                                        <issuelink>
            <issuekey id="634833">SERVER-38168</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="383699">SERVER-29219</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10320">
                    <name>Documented</name>
                                                                <inwardlinks description="is documented by">
                                        <issuelink>
            <issuekey id="667166">DOCS-12336</issuekey>
        </issuelink>
                            </inwardlinks>
                                    </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="445007">SERVER-31555</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
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                <attachments>
                            <attachment id="195698" name="36252.patch" size="5452" author="daniel.gottlieb@mongodb.com" created="Mon, 10 Sep 2018 20:23:23 +0000"/>
                            <attachment id="197724" name="36252_lz4_and_zstd.patch" size="6940" author="alexander.gorrod@mongodb.com" created="Wed, 3 Oct 2018 04:14:27 +0000"/>
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