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Yes, there is intention to add it to lfs find. Whether or not it should disqualify results is up to you at I/O 500 - it seems like if most users would think it acceptable for find most of the time (and it should be), then it should probably be allowed. But
at the same time, its (theoretical - couldn’t today) use for mdtest would very much be “writing to the benchmark” and defeating the intent.<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> John Bent <johnbent@gmail.com><br>
<b>Sent:</b> Tuesday, July 17, 2018 11:54:32 PM<br>
<b>To:</b> Patrick Farrell<br>
<b>Cc:</b> Abe Asraoui; lustre-devel@lists.lustre.org; lustre-discuss@lists.lustre.org<br>
<b>Subject:</b> Re: [lustre-devel] MDT test in rel2.11</font>
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<div dir="ltr">Thanks Patrick. That's interesting. However, the exact motivation why IO500 has the 'find' command is this same intended use case; stale results therefore actually present an interesting dilemma to IO500. They are not POSIX compliant but that
loss of compliance shouldn't necessarily disqualify this result...</div>
<div class="x_gmail_extra"><br>
<div class="x_gmail_quote">On Wed, Jul 18, 2018 at 12:49 AM, Patrick Farrell <span dir="ltr">
<<a href="mailto:paf@cray.com" target="_blank">paf@cray.com</a>></span> wrote:<br>
<blockquote class="x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
<div>Lazy SoM is not landed yet, and it won’t be improving benchmark scores - it’s never “known 100% correct”, so it can’t be used for actual POSIX ops - if a file size read out is used for a write offset, then you’ve got data corruption.<br>
<br>
So for now it’s strictly limited to tools that know about it (accessed via an ioctl) and can accept information that may be stale. The intended use case is scanning the FS for policy application.<br>
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<div id="x_m_1132425410844018439divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> John Bent <<a href="mailto:johnbent@gmail.com" target="_blank">johnbent@gmail.com</a>><br>
<b>Sent:</b> Tuesday, July 17, 2018 10:55:24 PM<br>
<b>To:</b> Patrick Farrell<br>
<b>Cc:</b> Abe Asraoui; <a href="mailto:lustre-devel@lists.lustre.org" target="_blank">
lustre-devel@lists.lustre.org</a>; <a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">
lustre-discuss@lists.lustre.<wbr>org</a><br>
<b>Subject:</b> Re: [lustre-devel] MDT test in rel2.11</font>
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<div dir="ltr">I'm curious about how DOM improves IO500 scores. :)
<div>Also LSOM but I don't know actually whether that's in 2.11 or where.</div>
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<div class="x_m_1132425410844018439x_gmail_extra"><br>
<div class="x_m_1132425410844018439x_gmail_quote">On Tue, Jul 17, 2018 at 11:33 PM, Patrick Farrell
<span dir="ltr"><<a href="mailto:paf@cray.com" target="_blank">paf@cray.com</a>></span> wrote:<br>
<blockquote class="x_m_1132425410844018439x_gmail_quote" style="margin:0 0 0 .8ex; border-left:1px #ccc solid; padding-left:1ex">
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Abe,<br>
<br>
Any benchmarking would be highly dependent on hardware, both client and server. Is there a particular comparison (say, between versions) you’re interested in or something you’re concerned about?<br>
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- Patrick<br>
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<div id="x_m_1132425410844018439x_m_7805051326561734487divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> lustre-devel <<a href="mailto:lustre-devel-bounces@lists.lustre.org" target="_blank">lustre-devel-bounces@lists.lu<wbr>stre.org</a>>
on behalf of Abe Asraoui <<a href="mailto:AbeA@supermicro.com" target="_blank">AbeA@supermicro.com</a>><br>
<b>Sent:</b> Tuesday, July 17, 2018 9:23:10 PM<br>
<b>To:</b> <a href="mailto:lustre-devel@lists.lustre.org" target="_blank">lustre-devel@lists.lustre.org</a>;
<a href="mailto:lustre-discuss@lists.lustre.org" target="_blank">lustre-discuss@lists.lustre.or<wbr>g</a>; Abe Asraoui<br>
<b>Subject:</b> [lustre-devel] MDT test in rel2.11</font>
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<div class="x_m_1132425410844018439x_m_7805051326561734487PlainText">Hi All,<br>
<br>
<br>
Has anyone done any MDT testing under the latest rel2.11 and have benchmark data to share?<br>
<br>
<br>
Thanks,<br>
Abe<br>
<br>
<br>
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