[gpfsug-discuss] Rebalancing with mmrestripefs -P
Frederick Stock
stockf at us.ibm.com
Mon Aug 20 19:02:05 BST 2018
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
stockf at us.ibm.com
From: David Johnson <david_johnson at brown.edu>
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: 08/20/2018 12:55 PM
Subject: [gpfsug-discuss] Rebalancing with mmrestripefs -P
Sent by: gpfsug-discuss-bounces at spectrumscale.org
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_______________________________________________
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