[gpfsug-discuss] waiters and files causing waiters

[IBM Spectrum Scale]

The short answer is there is no easy way to determine what file/directory 
a waiter may be related.  Generally, it is not necessary to know the 
file/directory since a properly sized/configured cluster should not have 
long waiters occurring, unless there is some type of failure in the 
cluster.  If you were to capture sufficient information across the cluster 
you might be able to work out the file/directory involved in a long waiter 
but it would take either trace, or combing through lots of internal data 
structures.

It would be helpful to know more details about your cluster to provide 
suggestions for what may be causing the long waiters.  I presume you are 
seeing them on a regular basis and would like to understand why they are 
occurring.

Regards, The Spectrum Scale (GPFS) team

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From:   Damir Krstic <damir.krstic at gmail.com>
To:     gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date:   10/10/2019 04:44 PM
Subject:        [EXTERNAL] [gpfsug-discuss] waiters and files causing 
waiters
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



is it possible via some set of mmdiag --waiters or mmfsadm dump ? to 
figure out which files or directories access (whether it's read or write) 
is causing long-er waiters?

in all my looking i have not been able to get that information out of 
various diagnostic commands.

thanks,
damir_______________________________________________
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