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/LU-8150 Lustre <p>File creates are not tracked on the MDS in the md_stats file:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># lctl set_param mdt.*.md_stats=clear mdt.lustre-MDT0000.md_stats=clear # touch /mnt/lustre/newfile1 # lctl get_param mdt.*.md_stats mdt.lustre-MDT0000.md_stats= snapshot_time 1463430465.508409 secs.usecs open 1 samples [reqs] close 1 samples [reqs] getattr 1 samples [reqs] setattr 1 samples [reqs] getxattr 1 samples [reqs] setxattr 1 samples [reqs] </pre> </div></div> <p>If you call mknod() with <b>S_IFREG</b> to create a file, it <b>is</b> tracked as a mknod. Most file creates are from open with create intent.</p> LU-8150

Track creates in MDS stats

Bug Minor Resolved Fixed Bob Glossman Matt Ezell patch Mon, 16 May 2016 20:55:04 +0000 Tue, 22 Nov 2016 00:02:01 +0000 Wed, 22 Jun 2016 15:06:34 +0000 Lustre 2.8.0 Lustre 2.9.0 0 8 <p>Matt Ezell (ezellma@ornl.gov) uploaded a new patch: <a href="http://review.whamcloud.com/20246" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/20246</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8150" title="Track creates in MDS stats" class="issue-link" data-issue-key="LU-8150"><del>LU-8150</del></a> mdt: Track open+create as mknod<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 353fcf21eff5c8560ea7f301e7fafd28516ad63f</p> <p>With the patch I just uploaded, open with create intent is now tallied as a mknod. I chose this route instead of adding a new stat bucket for create to minimize the impact on tools that parse md_stats and job_stats.</p> <p>Previous test case after patch:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre># lctl set_param mdt.*.md_stats=clear mdt.lustre-MDT0000.md_stats=clear # touch /mnt/lustre/newfile2 # lctl get_param mdt.*.md_stats mdt.lustre-MDT0000.md_stats= snapshot_time 1463431661.429641 secs.usecs open 1 samples [reqs] close 1 samples [reqs] mknod 1 samples [reqs] getattr 1 samples [reqs] setattr 1 samples [reqs] getxattr 1 samples [reqs] setxattr 1 samples [reqs] </pre> </div></div> <p>This also needs an update to the Lustre User Manual, in the LustreMonitoring.xml file for JobID stats (search for "getxattr").</p> <p>The other question that Oleg and I were discussing is whether there should be an equivalent change on the mdc and/or llite stats to distinguish between open and create stats? This can be checked after the client got the <b>reply</b> to see if the new inode was created, either by comparing the before and after FIDs (same FID == create new file, different FID == open existing file), or checking the reply disposition for <tt>DISP_OPEN_CREATE</tt>.</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/20246/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/20246/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-8150" title="Track creates in MDS stats" class="issue-link" data-issue-key="LU-8150"><del>LU-8150</del></a> mdt: Track open+create as mknod<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 6c2bbc022832087f2ff0f65d83e3b0a460e45911</p> <p>Landed to master for 2.9.0</p> Related LU-8335 Development End date Tue, 17 May 2016 20:55:04 +0000 Rank 1|hzybr3: Rank (Obsolete) 9223372036854775807 Severity Start date Mon, 16 May 2016 20:55:04 +0000