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HajoEhlers
HajoEhlers
251 Posts
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Pinned topic FYI: Performace problem during nulling/empty a 4TB file

‏2013-04-03T12:51:26Z |
Given
GPFS: 3.4.0.19
Quotas: enabled

Task:
Null/empty a 4 TB file via

> /gpfs/fileset1/VeryBigFile
within a fileset.

Problem:
- The task took minutes to complete.
- A

ls -la /gpfs/fileset1/ 
returned after the 'nulling' finished. Thus the "ls" seems to hang during this time.

Observation:
I checked the quota usage for the given fileset and say a reduction in disk usage of around 10-20GB /sec

cheers
Hajo