[gpfsug-discuss] Capacity pool filling

[Uwe Falke]

> 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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