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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-49014] Add additional timestamping tests to the KVEngine test harness</title>
                <link>https://jira.mongodb.org/browse/SERVER-49014</link>
                <project id="10000" key="SERVER">Core Server</project>
                    <description>&lt;p&gt;The &lt;a href=&quot;https://github.com/mongodb/mongo/blob/master/src/mongo/db/storage/kv/kv_engine_test_harness.cpp&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;KVEngine test harness&lt;/a&gt; allows us to create a single set of unit tests that runs on multiple storage engines.&lt;/p&gt;

&lt;p&gt;In order to have a test-driven development approach for adding timestamp support for Biggie, we should add additional unit tests to the harness to increase our test coverage for the storage engines.&lt;/p&gt;

&lt;p&gt;We can deterministically identify what the timestamps (oldest, stable, all durable) should be set to after performing a set of operations.&lt;br/&gt;
 &#160;&lt;/p&gt;

&lt;p&gt;A few simple examples of unit tests could be:&lt;/p&gt;
&lt;ol&gt;
	&lt;li&gt;Pinning the oldest timestamp (by keeping a read transaction open) and performing write operations at a later time. Opening a new read transaction on an older timestamp, prior to when the writes committed, we shouldn&apos;t see any of those changes.&lt;/li&gt;
	&lt;li&gt;Rolling back to the last stable timestamp should remove any changes made since the last stable timestamp.&lt;/li&gt;
	&lt;li&gt;When all open transactions commit, the all durable timestamp should be advanced when the final transaction is finished.&lt;/li&gt;
&lt;/ol&gt;


&lt;p&gt;Obviously, this isn&apos;t an extensive list and we should add more.&lt;/p&gt;

&lt;p&gt;&#160;&lt;br/&gt;
 I&apos;ve attached a file of additional timestamp cases we can exercise made by &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;.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1385988">SERVER-49014</key>
            <summary>Add additional timestamping tests to the KVEngine test harness</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="bynn.lee@mongodb.com">Bynn Lee</assignee>
                                    <reporter username="gregory.wlodarek@mongodb.com">Gregory Wlodarek</reporter>
                        <labels>
                            <label>intern_ephemeral_for_test</label>
                    </labels>
                <created>Mon, 22 Jun 2020 17:24:54 +0000</created>
                <updated>Sun, 29 Oct 2023 22:06:41 +0000</updated>
                            <resolved>Tue, 14 Jul 2020 21:15:10 +0000</resolved>
                                                    <fixVersion>4.7.0</fixVersion>
                                    <component>Testing Infrastructure</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="3285211" author="xgen-internal-githook" created="Tue, 14 Jul 2020 21:06:55 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;Bynn Lee&apos;, &apos;email&apos;: &apos;bynn.lee@mongodb.com&apos;, &apos;username&apos;: &apos;bynn&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/SERVER-49014&quot; title=&quot;Add additional timestamping tests to the KVEngine test harness&quot; class=&quot;issue-link&quot; data-issue-key=&quot;SERVER-49014&quot;&gt;&lt;del&gt;SERVER-49014&lt;/del&gt;&lt;/a&gt; Add additional timestamping tests to the KVEngine test harness&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo/commit/5bb3a09729ea6d03b3a17915bb4bc3e6e5105fdd&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo/commit/5bb3a09729ea6d03b3a17915bb4bc3e6e5105fdd&lt;/a&gt;&lt;/p&gt;</comment>
                    </comments>
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                            <attachment id="266846" name="biggie_timestamps.txt" size="9754" author="gregory.wlodarek@mongodb.com" created="Mon, 22 Jun 2020 17:17:12 +0000"/>
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