[Pvfs2-users] pvfs2 performance tuning

[Becky Ligon]

You have a bottleneck by using only one metadata server.  Make all 32
nodes BOTH i/o and meta data servers.  Grouping the servers like you did
is a GOOD thing.

Becky
-- 
Becky Ligon
PVFS Developer
Clemson University
864-650-4065

> HI, all
>
> 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?
>
> _______________________________________________
> Pvfs2-users mailing list
> Pvfs2-users at beowulf-underground.org
> http://www.beowulf-underground.org/mailman/listinfo/pvfs2-users
>