[Pvfs2-users] pvfs2 configuration questions
harms at alcf.anl.gov
Mon Nov 9 12:24:41 EST 2009
here are settings that can be applied on a per directory basis.
# set files to use only one i/o server
setfattr -n "user.pvfs2.num_dfiles" -v "1" ./dir
# set strip size to 1MB for simple_stripe distribution.
setfattr -n "user.pvfs2.dist_params" -v "strip_size:1048576" ./dir
I have no idea if using these settings would actually be an
improvement in performance.
On Nov 6, 2009, at 5:18 PM, Jim Kusznir wrote:
> Hi again:
> The same user later came to me with a document for a toolkit she's
> trying to run on the cluster. It said that for those running luster,
> please ensure that the luster settings are as follows:
> stripe size 0 (default, typically 1MB)
> stripe offset -1 (default, typically round robin)
> stripe count 1 (do not split the file onto multiple OSTs)
> Apparently this toolkit does a lot of IO on a lot of very small files.
> Is there something I should/could do to pvfs, at least to her
> directory, to enhance the performance of this? Better yet, is there a
> command she can run to set this up on her directory?
> Pvfs2-users mailing list
> Pvfs2-users at beowulf-underground.org
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