Lustre discuss - Oct 2010 - finding clients that is opening/closing files

I have wat I think is a badly behaving user, look at 
/proc/fs/lustre/mds/nobackup-MDT0000/stats

The open/close counters are running about 1000/s,

I would like to track down what clients this is coming from and knock the users
about fixing there code that are doing this.

how does does look at ''stats by node''  do I need to look at
all clients?  Or can I get this information from the mds?
Thanks!

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp at umich.edu
(734)936-1985

One way is to check the "/proc/fs/lustre/mds/*/exports/*/stats" files,
which
contains per-client statistics.  They can be cleared by writing "0" to
the
file, and then check for files with lots of operations.


On 26 October 2010 20:10, Brock Palen <brockp at umich.edu> wrote:
> I have wat I think is a badly behaving user, look at
> /proc/fs/lustre/mds/nobackup-MDT0000/stats
>
> The open/close counters are running about 1000/s,
>
> I would like to track down what clients this is coming from and knock the
> users about fixing there code that are doing this.
>
> how does does look at ''stats by node''  do I need to look
at all clients?
>  Or can I get this information from the mds?
> Thanks!
>
> Brock Palen
> www.umich.edu/~brockp <http://www.umich.edu/%7Ebrockp>
> Center for Advanced Computing
> brockp at umich.edu
> (734)936-1985
>
>
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>


-- 
Wojciech Turek

Senior System Architect

High Performance Computing Service
University of Cambridge
Email: wjt27 at cam.ac.uk
Tel: (+)44 1223 763517
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This was very helpful, I found the culprit. 

Brock Palen
www.umich.edu/~brockp
Center for Advanced Computing
brockp at umich.edu
(734)936-1985



On Oct 26, 2010, at 3:42 PM, Wojciech Turek wrote:
> One way is to check the "/proc/fs/lustre/mds/*/exports/*/stats"
files, which contains per-client statistics.  They can be cleared by writing
"0" to the file, and then check for files with lots of operations.
> 
> 
> On 26 October 2010 20:10, Brock Palen <brockp at umich.edu> wrote:
> I have wat I think is a badly behaving user, look at
> /proc/fs/lustre/mds/nobackup-MDT0000/stats
> 
> The open/close counters are running about 1000/s,
> 
> I would like to track down what clients this is coming from and knock the
users about fixing there code that are doing this.
> 
> how does does look at ''stats by node''  do I need to look
at all clients?  Or can I get this information from the mds?
> Thanks!
> 
> Brock Palen
> www.umich.edu/~brockp
> Center for Advanced Computing
> brockp at umich.edu
> (734)936-1985
> 
> 
> 
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
> 
> 
> 
> -- 
> Wojciech Turek
> 
> Senior System Architect
> 
> High Performance Computing Service
> University of Cambridge
> Email: wjt27 at cam.ac.uk
> Tel: (+)44 1223 763517

You could check /proc/fs/lustre/mds/client-<MDT>/exports/<NID>/stats
on
your MDS.

That contains per client stats for the MDS.

-Josh

On 10/26/10 3:10 PM, Brock Palen wrote:
> I have wat I think is a badly behaving user, look at
> /proc/fs/lustre/mds/nobackup-MDT0000/stats
>
> The open/close counters are running about 1000/s,
>
> I would like to track down what clients this is coming from and knock the
users about fixing there code that are doing this.
>
> how does does look at ''stats by node''  do I need to look
at all clients?  Or can I get this information from the mds?
> Thanks!
>
> Brock Palen
> www.umich.edu/~brockp
> Center for Advanced Computing
> brockp at umich.edu
> (734)936-1985
>
>
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss