https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LUDOC-410 Lustre Documentation <p>The latest manual discusses displaying changelog user information in</p> <h4><a name="12.1.2.5.%C2%A0DisplayingtheChangelogIndexandRegisteredUsers"></a>12.1.2.5. Displaying the Changelog Index and Registered Users</h4> <p>mdd.*.changelog_size is also important to document, since unconsumed changelogs can cause problems.</p> <p>This should also include the UNITS that this changelog size is reporting. It's a number, what does that number mean? This is a pet peeve of mine with various lustre stats and numbers from lctl. Some give an xml-ish output with units, others give a number. Chaos! If units aren't included, let's document them.</p> <p> </p> LUDOC-410

document lctl get_param for changelog size

Improvement Minor Open Unresolved Lustre Manual Triage Scott Nolin Wed, 8 Aug 2018 18:46:52 +0000 Sat, 31 Oct 2020 00:53:18 +0000 0 6 <p>To date I don't believe this request has been fulfilled.  So, what is the UNITS returned by "changelog_size" and what is the max value that would lend to the incursion of error messages such as:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>there are no more free slots in catalog </pre> </div></div> <p>The units of "<tt>changelog_size</tt>" are in bytes. You can use "<tt>lctl get_param mdd.*.changelog_users</tt>" to get this in "records" units:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>mdd.myth-MDT0000.changelog_users= current index: 75982977 ID index cl2 66834025 </pre> </div></div> <p>The "<tt>changelog_size</tt>" parameter was added in patch <a href="http://review.whamcloud.com/16416" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/16416</a> "<tt><a href="https://jira.whamcloud.com/browse/LU-7156" title="Provide size of changelogs" class="issue-link" data-issue-key="LU-7156"><del>LU-7156</del></a> mdd: add changelog_size to procfs</tt>".</p> Related LU-7156 Development Epic/Theme changelog Rank 1|i000hb: Rank (Obsolete) 9223372036854775807