<font size=3 face="sans-serif">Realize that generally any waiter under
1 second should be ignored. In an active GPFS system there are always
waiters and the greater the use of the system likely the more waiters you
will see. The point is waiters themselves are not an indication your
system is having problems.</font><br><br><font size=3 face="sans-serif">As for creating them any steady level
of activity against the file system should cause waiters to appear, though
most should be of a short duration.</font><br><br><br><font size=3 face="sans-serif">Fred<br>__________________________________________________<br>Fred Stock | IBM Pittsburgh Lab | 720-430-8821<br>stockf@us.ibm.com</font><br><br><br><br><font size=1 color=#5f5f5f face="sans-serif">From:
</font><font size=1 face="sans-serif">Stijn De Weirdt <stijn.deweirdt@ugent.be></font><br><font size=1 color=#5f5f5f face="sans-serif">To:
</font><font size=1 face="sans-serif">gpfsug-discuss@spectrumscale.org</font><br><font size=1 color=#5f5f5f face="sans-serif">Date:
</font><font size=1 face="sans-serif">06/06/2017 08:31 AM</font><br><font size=1 color=#5f5f5f face="sans-serif">Subject:
</font><font size=1 face="sans-serif">Re: [gpfsug-discuss]
gpfs waiters debugging</font><br><font size=1 color=#5f5f5f face="sans-serif">Sent by:
</font><font size=1 face="sans-serif">gpfsug-discuss-bounces@spectrumscale.org</font><br><hr noshade><br><br><br><tt><font size=2>hi bob,<br><br>waiters from RPC replies and/or threads waiting on mutex are most "popular".<br><br>but my question is not how to resolve them, the question is how to<br>create such a waiter so we can train ourself in grep and mmfsadm etc etc<br><br>we want to recreate the waiters a few times, try out some things and<br>either script or at least put instructions on our internal wiki what to
do.<br><br>the instructions in the slides are clear enough, but there are a lot of<br>slides, and typically when this occurs offshift, you don't want to start<br>with rereading the slides and wondering what to do next; let alone debug<br>scripts ;)<br><br>thanks,<br><br>stijn<br><br>On 06/06/2017 01:44 PM, Oesterlin, Robert wrote:<br>> Hi Stijn<br>> <br>> You need to provide some more details on the type and duration of
the waiters before the group can offer some advice.<br>> <br>> Bob Oesterlin<br>> Sr Principal Storage Engineer, Nuance<br>> <br>> <br>> <br>> On 6/6/17, 2:05 AM, "gpfsug-discuss-bounces@spectrumscale.org
on behalf of Stijn De Weirdt" <gpfsug-discuss-bounces@spectrumscale.org
on behalf of stijn.deweirdt@ugent.be> wrote:<br>> <br>> <br>> but we are wondering if and how we can cause those waiters
ourself, so<br>> we can train ourself in debugging and resolving them
(either on test<br>> system or in controlled environment on the production
clusters).<br>> <br>> all hints welcome.<br>> <br>> stijn<br>> _______________________________________________<br>> <br>> <br>> _______________________________________________<br>> gpfsug-discuss mailing list<br>> gpfsug-discuss at spectrumscale.org<br>> </font></tt><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><tt><font size=2>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</font></tt></a><tt><font size=2><br>> <br>_______________________________________________<br>gpfsug-discuss mailing list<br>gpfsug-discuss at spectrumscale.org<br></font></tt><a href="http://gpfsug.org/mailman/listinfo/gpfsug-discuss"><tt><font size=2>http://gpfsug.org/mailman/listinfo/gpfsug-discuss</font></tt></a><tt><font size=2><br><br></font></tt><br><br><BR>