[Pvfs2-users] pvfs2 performance tuning
zhoujiang at ncic.ac.cn
Wed Dec 1 03:30:03 EST 2010
Now I have 32 nodes, both are used as IO servers and clients, one as
metadata server. When I write a different
file in each client(e.g. client1 write /mnt/pvfs2/file1, client2 write
/mnt/pvfs2/files), the aggregate io throughout tested by iozone(read/write)
is only half of performance of 4 nodes(both as IO servers and clients).
I think each file are striped to 32 nodes will cause the additional network
and data transaction overhead.
If each file are only striped to small scale nodes(such as only 4 nodes
among 32), the performance will be improved ?
But when I use twod_stripe mode, which divides the 32 IO servers into 7
groups, each group strip factor is 256 and stripe size is 32M, the
performance is not improved as expected.
Would you please tell me how to control each file to be stored into
different IO servers or improve the pvfs2 performance in 32 nodes by tuning
parameters or others?
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