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<DIV><FONT color=#000080 size=2 face=Verdana>Hi, all</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>Sorry, I should show the lustre version in
details. The </FONT><FONT color=#000080>version for our system as
follows:</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>MDS: V1.6.5</FONT></DIV>
<DIV><FONT color=#000080>OSS: V1.6.6</FONT></DIV>
<DIV><FONT color=#000080>Clients: V1.6.6</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#000080>Thank you for your help.</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>Best wishes,</FONT></DIV>
<DIV><FONT color=#000080>Sarea</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2009-08-18 </FONT></DIV><FONT
color=#000080 size=2 face=Verdana>
<HR style="WIDTH: 100px" align=left color=#b5c4df SIZE=1>
</FONT>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>huangql</SPAN> </FONT></DIV>
<HR color=#b5c4df SIZE=1>
<DIV><FONT size=2 face=Verdana><STRONG>发件人：</STRONG> Alexey Lyashkov
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>发送时间：</STRONG> 2009-08-17 22:31:58
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>收件人：</STRONG> huangql </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>抄送：</STRONG> lustre-discuss </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>主题：</STRONG> Re: [Lustre-discuss] Why are
there many threads named "ll_imp_inval"in client? </FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
<DIV><FONT size=2 face=Verdana>
<DIV>Hi huangql,</DIV>
<DIV></DIV>
<DIV>which lustre version you using? </DIV>
<DIV></DIV>
<DIV>On Mon, 2009-08-17 at 15:23 +0800, huangql wrote:</DIV>
<DIV>> Hi, all</DIV>
<DIV>> </DIV>
<DIV>> Our system run well past two weeks, However, we found there are some</DIV>
<DIV>> computing nodes which has so many threads named "ll_imp_inval", and</DIV>
<DIV>> the load average of the clients(computing nodes) is up to 28. As a</DIV>
<DIV>> results, Users can't submit jobs to the clients. I read the source</DIV>
<DIV>> file(import.c) and In my opinion, when each ptlrpc-connect-import or</DIV>
<DIV>> ptlrpc-import-recovery, the ll_imp_inval thread is triggered. So if</DIV>
<DIV>> the server or clients have something wrong, the thread will not exit.</DIV>
<DIV>> Is it right?</DIV>
<DIV>> </DIV>
<DIV>don't. ll_imp_inval is evictor thread - which started if client isn't</DIV>
<DIV>connected to server (MDS or OST) until recovery is finished, and server</DIV>
<DIV>ask client to flush own staled data.</DIV>
<DIV></DIV>
<DIV></DIV>
<DIV>> </DIV>
<DIV>> we run 'ps -aux | grep ll_imp_inval' ,the results as follows:</DIV>
<DIV>> </DIV>
<DIV>> root 22568 0.0 0.0 0 0 ? D Aug13 0:00 [ll_imp_inval]</DIV>
<DIV>> root 22569 0.0 0.0 0 0 ? D Aug13 0:00 [ll_imp_inval]</DIV>
<DIV>> root 22570 0.0 0.0 0 0 ? D Aug13 0:00 [ll_imp_inval]</DIV>
<DIV>> root 22571 0.0 0.0 0 0 ? D Aug13 0:00 [ll_imp_inval]</DIV>
<DIV>> ...</DIV>
<DIV>is possible to see output from sysrq-t (echo t > /proc/sysrq-trigger) ?</DIV>
<DIV></DIV>
<DIV></DIV>
<DIV>> </DIV>
<DIV>> We had check out the log, and found the main messages as follows,and</DIV>
<DIV>> in other nodes we can get the client evicted messages:</DIV>
<DIV>> </DIV>
<DIV>> </DIV>
<DIV>> </DIV>
<DIV>> Thank you for your help in advance and I hope receive your letter as</DIV>
<DIV>> soon as possible.</DIV>
<DIV>> </DIV>
<DIV>> </DIV>
<DIV>> Best wishes,</DIV>
<DIV>> Sarea</DIV>
<DIV>> </DIV>
<DIV>> </DIV>
<DIV>> 2009-08-17 </DIV>
<DIV>> </DIV>
<DIV>> ______________________________________________________________________</DIV>
<DIV>> huangql </DIV>
<DIV>> _______________________________________________</DIV>
<DIV>> Lustre-discuss mailing list</DIV>
<DIV>> Lustre-discuss@lists.lustre.org</DIV>
<DIV>> http://lists.lustre.org/mailman/listinfo/lustre-discuss</DIV>
<DIV></DIV>
<DIV></DIV></FONT></DIV></BODY></HTML>