Does anyone have a good rule of thumb for iops to allow for background QOS tasks?
-- ddj Dave Johnson > On Aug 20, 2018, at 2:02 PM, Frederick Stock <[email protected]> wrote: > > That should do what you want. Be aware that mmrestripefs generates > significant IO load so you should either use the QoS feature to mitigate its > impact or run the command when the system is not very busy. > > Note you have two additional NSDs in the 33 failure group than you do in the > 23 failure group. You may want to change one of those NSDs in failure group > 33 to be in failure group 23 so you have equal storage space in both failure > groups. > > Fred > __________________________________________________ > Fred Stock | IBM Pittsburgh Lab | 720-430-8821 > [email protected] > > > > From: David Johnson <[email protected]> > To: gpfsug main discussion list <[email protected]> > Date: 08/20/2018 12:55 PM > Subject: [gpfsug-discuss] Rebalancing with mmrestripefs -P > Sent by: [email protected] > > > > I have one storage pool that was recently doubled, and another pool migrated > there using mmapplypolicy. > The new half is only 50% full, and the old half is 94% full. > > Disks in storage pool: cit_10tb (Maximum disk size allowed is 516 TB) > d05_george_23 50.49T 23 No Yes 25.91T ( 51%) > 18.93G ( 0%) > d04_george_23 50.49T 23 No Yes 25.91T ( 51%) > 18.9G ( 0%) > d03_george_23 50.49T 23 No Yes 25.9T ( 51%) > 19.12G ( 0%) > d02_george_23 50.49T 23 No Yes 25.9T ( 51%) > 19.03G ( 0%) > d01_george_23 50.49T 23 No Yes 25.9T ( 51%) > 18.92G ( 0%) > d00_george_23 50.49T 23 No Yes 25.91T ( 51%) > 19.05G ( 0%) > d06_cit_33 50.49T 33 No Yes 3.084T ( 6%) > 70.35G ( 0%) > d07_cit_33 50.49T 33 No Yes 3.084T ( 6%) > 70.2G ( 0%) > d05_cit_33 50.49T 33 No Yes 3.084T ( 6%) > 69.93G ( 0%) > d04_cit_33 50.49T 33 No Yes 3.085T ( 6%) > 70.11G ( 0%) > d03_cit_33 50.49T 33 No Yes 3.084T ( 6%) > 70.08G ( 0%) > d02_cit_33 50.49T 33 No Yes 3.083T ( 6%) > 70.3G ( 0%) > d01_cit_33 50.49T 33 No Yes 3.085T ( 6%) > 70.25G ( 0%) > d00_cit_33 50.49T 33 No Yes 3.083T ( 6%) > 70.28G ( 0%) > ------------- -------------------- > ------------------- > (pool total) 706.9T 180.1T ( 25%) > 675.5G ( 0%) > > Will the command "mmrestripfs /gpfs -b -P cit_10tb” move the data blocks > from the _cit_ NSDs to the _george_ NSDs, > so that they end up all around 75% full? > > Thanks, > — ddj > Dave Johnson > Brown University CCV/CIS_______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss > > > > _______________________________________________ > gpfsug-discuss mailing list > gpfsug-discuss at spectrumscale.org > http://gpfsug.org/mailman/listinfo/gpfsug-discuss
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