Jim, 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" ./dirI have no idea if using these settings would actually be an improvement in performance.
kevin 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? Thanks! --Jim _______________________________________________ Pvfs2-users mailing list [email protected] http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
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