<div dir="ltr">Hi Jessica,<div><br></div><div>What STAGE_GET_FID_threads_max and STAGE_GET_INFO_FS_threads_max values are you using?</div><div><br></div><div>Also what nb_threads values are you using for your robinhood configuration?</div><div><br></div><div>Also, when you see the disconnects between the clients and the MDS, what does the MDS load actually look like? Is the system overloaded? </div><div><br></div><div>Did you happen to ever benchmark your MDS to find out what kind of performance you can expect out of it? (mdtest?)</div><div><br></div><div>-cf</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, May 18, 2017 at 12:36 PM, Jessica Otey <span dir="ltr"><<a href="mailto:jotey@nrao.edu" target="_blank">jotey@nrao.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Hi Megan,<br>
</p>
<p>Thanks for your input. We use percona, a drop-in replacement for
mysql... The robinhood activity floods the MDT, but it does not
seem to produce any excessive load on the robinhood box...</p>
<p>Anyway, FWIW...<br>
</p>
<p>~]# mysql --version<br>
mysql Ver 14.14 Distrib 5.5.54-38.6, for Linux (x86_64) using
readline 5.1<br>
</p>
<p>Product: robinhood<br>
Version: 3.0-1<br>
Build: 2017-03-13 10:29:26<br>
<br>
Compilation switches:<br>
Lustre filesystems<br>
Lustre Version: 2.5<br>
Address entries by FID<br>
MDT Changelogs supported<br>
<br>
Database binding: MySQL<br>
</p>
<p>RPM: robinhood-lustre-3.0-1.<wbr>lustre2.5.el6.x86_64</p>
Lustre rpms:<br>
<p>lustre-client-2.5.5-2.6.32_<wbr>642.15.1.el6.x86_64_g22a210f.<wbr>x86_64<br>
lustre-client-modules-2.5.5-2.<wbr>6.32_642.15.1.el6.x86_64_<wbr>g22a210f.x86_64<br>
</p>
<br>
<div class="m_543645643510133342moz-cite-prefix">On 5/18/17 11:55 AM, Ms. Megan Larko
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>With regards to (WRT) Subject "Robinhood exhausting RPC
resources against 2.5.5 lustre file systems", what version
of robinhood and what version of MySQL database? I mention
this because I have been working with robinhood-3.0-0.rc1 and
initially MySQL-5.5.32 and Lustre 2.5.42.1 on
kernel-2.6.32-573 and had issues in which the robinhood server
consumed more than the total amount of 32 CPU cores on the
robinhood server (with 128 G RAM) and would functionally hang
the robinhood server. The issue was solved for me by
changing to MySQL-5.6.35. It was the "sort" command in
robinhood that was not working well with the MySQL-5.5.32.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>megan</div>
</div>
<div class="gmail_extra"><br>
</div>
</blockquote>
<br>
</div>
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