[gpfsug-discuss] limit / fair share of GPFS bandwidth

Marc A Kaplan makaplan at us.ibm.com
Sun Jan 28 15:53:47 GMT 2018


Depends...  While the current version of mmchqos is primarily geared 
towards controlling "maintenance" tasks.
 
It can be used to limit  (cap) the IOP rate for IOs coming from a 
particular GFPFS client node. 

You would need a version that supports the -N option on the mmchqos 
command and then configure each node that will mount the FS.

Caution: try some experiments on a test system -- incorrect configuration 
can severely impact performance to the point where it can appear that 
things are totally "stuck"!   mmchqos FS --disable  --reset  should get 
you back to the default config for gpfs/QOS.



From:   "Eg. Bo." <egonle at aim.com>
To:     gpfsug-discuss at spectrumscale.org
Date:   01/27/2018 12:23 PM
Subject:        [gpfsug-discuss] limit / fair share of GPFS bandwidth
Sent by:        gpfsug-discuss-bounces at spectrumscale.org



Hello,

 while operating a GPFS filesystem for HPC some workload of few clients is 
able to eat available storage and NSD performance. Compute Nodes and NSD 
servers are connected to Infiniband. This question somehow is weird but is 
there a way to limit performance / I/O / bandwidth consumption for nodes 
so that other node still get "good" performance?


Thanks,

 Eg. Bo. egonle at aim.com _______________________________________________
gpfsug-discuss mailing list
gpfsug-discuss at spectrumscale.org
https://urldefense.proofpoint.com/v2/url?u=http-3A__gpfsug.org_mailman_listinfo_gpfsug-2Ddiscuss&d=DwICAg&c=jf_iaSHvJObTbx-siA1ZOg&r=cvpnBBH0j41aQy0RPiG2xRL_M8mTc1izuQD3_PmtjZ8&m=r0AtLTBmDo_uZhIdntBO8k2-1Alg_2LBLPoJamV-zsY&s=BXGAuET7K4UhA24P72F4YRsAdcdJR3H02gqGOERENlE&e=





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20180128/1dd00d49/attachment-0002.htm>


More information about the gpfsug-discuss mailing list