[Linux-cluster] Why GFS is so slow? What it is waiting for?

[Gordan Bobic]

30K files?!
That'll take a while even on a local file system.

Gordan

Ja S wrote:
> Hi, All:
> 
> I used to post this question before, but have not
> received any comments yet. Please allow me post it
> again.
> 
> I have a subdirectory containing more than 30,000
> small files on a SAN storage (GFS1+DLM, RAID10). No
> user application knows the existence of the
> subdirectory. In other words, the subdirectory is free
> of accessing. 
> 
> However, it took ages to list the subdirectory on an
> absolute idle cluster node. See below:
> 
> # time ls -la | wc -l
> 31767
> 
> real    3m5.249s
> user    0m0.628s
> sys     0m5.137s
> 
> There are about 3 minutes spent on somewhere. Does
> anyone have any clue what the system was waiting for?
> 
> 
> Thanks for your time and wish to see your valuable
> comments soon.
> 
> Jas
> 
> 
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