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    <title>Magnolia - Issue tracker</title>
    <link>https://jira.magnolia-cms.com</link>
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    <language>en-uk</language>    <build-info>
        <version>9.4.2</version>
        <build-number>940002</build-number>
        <build-date>19-01-2023</build-date>
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<item>
            <title>[MAGNOLIA-9052] Improve performance and scalability of versioning</title>
                <link>https://jira.magnolia-cms.com/browse/MAGNOLIA-9052</link>
                <project id="10000" key="MAGNOLIA">Magnolia</project>
                    <description>&lt;h3&gt;&lt;a name=&quot;Context&quot;&gt;&lt;/a&gt;Context&lt;/h3&gt;

&lt;p&gt;See the &lt;a href=&quot;https://www.notion.so/magnoliacms/UZH-Performance-Issues-8d058d6acf6a455d9e461ef5cf39749c?pvs=4#c3aabf918a0f4349b0556729d9a11650&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;notes from UHZ&lt;/a&gt; for pain points and initial findings&lt;/p&gt;

&lt;p&gt;The two main use cases for versioning are the ability to revert or recreate content changes on one hand and record keeping / archiving on the other. They differ in access pattern and retention policy:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;For reverting or recreating content changes we only need a couple recent versions but need to be able to access them quickly.&lt;/li&gt;
	&lt;li&gt;For record keeping we need to be able to keep many versions for a long time. Such versions are mostly write only. Read access latency does not play a big role.&lt;/li&gt;
&lt;/ul&gt;


&lt;h3&gt;&lt;a name=&quot;Questionsfordiscovery&quot;&gt;&lt;/a&gt;Questions for discovery&lt;/h3&gt;
&lt;ul&gt;
	&lt;li&gt;How can we keep the version history in JCR tidy?&lt;/li&gt;
	&lt;li&gt;Clean / archive in regular intervals or continuously? How do we make this transparent to the user?&lt;/li&gt;
	&lt;li&gt;Can we offload versioning partially or entirely (e.g. to &lt;a href=&quot;https://www.notion.so/magnoliacms/UZH-Performance-Issues-8d058d6acf6a455d9e461ef5cf39749c?pvs=4#aa5a8d649f6945c4851541d72278b8d2&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;git&lt;/a&gt;)? What back end services should we support?
	&lt;ul&gt;
		&lt;li&gt;We could implement an archiving back-end: versions after a certain threshold would get removed from JCR and placed into the archive for record keeping. The archiving back-end would only support he record keeping use case and not the revert and recreate one.&lt;/li&gt;
		&lt;li&gt;Code from UZH: &lt;span class=&quot;nobr&quot;&gt;&lt;a href=&quot;https://jira.magnolia-cms.com/secure/attachment/118533/118533_uzh-module-versioning.zip&quot; title=&quot;uzh-module-versioning.zip attached to MAGNOLIA-9052&quot;&gt;uzh-module-versioning.zip&lt;sup&gt;&lt;img class=&quot;rendericon&quot; src=&quot;https://jira.magnolia-cms.com/images/icons/link_attachment_7.gif&quot; height=&quot;7&quot; width=&quot;7&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/sup&gt;&lt;/a&gt;&lt;/span&gt;&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
	&lt;li&gt;Removing, offloading or archiving versions will also help in keeping the repository lean resulting in e.g. better search performance&lt;/li&gt;
	&lt;li&gt;Can we optimize the current versioning implementation?
	&lt;ul&gt;
		&lt;li&gt;Remove the extra workspace and all the copying to it&lt;/li&gt;
		&lt;li&gt;Rely on Jackrabbit versioning alone&lt;/li&gt;
		&lt;li&gt;Reduce synchronized code&lt;/li&gt;
	&lt;/ul&gt;
	&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment></environment>
        <key id="137228">MAGNOLIA-9052</key>
            <summary>Improve performance and scalability of versioning</summary>
                <type id="13" iconUrl="https://jira.magnolia-cms.com/secure/viewavatar?size=xsmall&amp;avatarId=10887&amp;avatarType=issuetype">Epic</type>
                                            <priority id="6" iconUrl="https://jira.magnolia-cms.com/images/icons/priorities/neutral.gif">Neutral</priority>
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                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="mduerig">Michael Duerig</reporter>
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                            <label>dx-core-6.3</label>
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                <created>Thu, 10 Aug 2023 17:02:19 +0200</created>
                <updated>Thu, 7 Dec 2023 15:08:09 +0100</updated>
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