[gpfsug-discuss] Capacity pool filling
Uwe Falke
UWEFALKE at de.ibm.com
Thu Jun 7 19:34:16 BST 2018
> However, I took a look in one of the restore directories under
> /gpfs23/ RESTORE using mmlsattr and I see files in all 3 pools!
> So ? I don?t think GPFS is doing this but the next thing I am
> going to do is follow up with our tape software vendor ? I bet
> they preserve the pool attribute on files and - like Jaime said -
> old stuff is therefore hitting the gpfs23capacity pool.
Hm, then the backup/restore must be doing very funny things. Usually, GPFS
should rule the
placement of new files, and I assume that a restore of a file, in
particular under a different name,
creates a new file. So, if your backup tool does override that GPFS
placement, it must be very
intimate with Scale :-).
I'd do some list scans of the capacity pool just to see what the files
appearing there from tape have in common.
If it's really that these files' data were on the capacity pool at the
last backup, they should not be affected by your dead NSD and a restore is
in vain anyway.
If that doesn't help or give no clue, then, if the data pool has some more
free space, you might try to run an upward/backward migration from
capacity to data .
And, yeah, as GPFS tends to stripe over all NSDs, all files in data large
enough plus some smaller ones would have data on your broken NSD. That's
the drawback of parallelization.
Maybe you'd ask the storage vendor whether they supply some more storage
for the fault of their (redundant?) device to alleviate your current
storage shortage ?
Mit freundlichen Grüßen / Kind regards
Dr. Uwe Falke
IT Specialist
High Performance Computing Services / Integrated Technology Services /
Data Center Services
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