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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Hello,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Is it usual to see 200’000-400’000 open files for a single ganesha process? Or does this indicate that something ist wrong?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">We have some issues with ganesha (on spectrum scale protocol nodes) reporting NFS3ERR_IO in the log. I noticed that the affected nodes have a large number of open files, 200’000-400’000 open files per daemon
(and 500 threads and about 250 client connections). Other nodes have 1’000 – 10’000 open files by ganesha only and don’t show the issue.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">If someone could explain how ganesha decides which files to keep open and which to close that would help, too. As NFSv3 is stateless the client doesn’t open/close a file, it’s the server to decide when to
close it? We do have a few NFSv4 clients, too.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Are there certain access patterns that can trigger such a large number of open file? Maybe traversing and reading a large number of small files?
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Thank you,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Heiner</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I did count the open files by counting the entries in /proc/<pid of ganesha>/fd/ . With several 100k entries I failed to do a ‘ls -ls’ to list all the symbolic links, hence I can’t relate the open files to
different exports easily.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I did post this to the ganesha mailing list, too.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB">-- </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="DE" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">=======================</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="DE" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">Heinrich Billich</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="DE" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">ETH Zürich</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">Informatikdienste</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">Tel.: +41 44 632 72 56</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">heinrich.billich@id.ethz.ch</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#18376A;mso-fareast-language:EN-GB">========================</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt;mso-fareast-language:EN-GB"> </span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
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