On 4/20/10 12:36 PM, Henning Fehrmann wrote:
Hello,
We purchased a disk based cache system. The content of the cache system
is NFS exported into our cluster. Currently we'd like to tweak the cache setup
to
increase the IO performance. There are tools like bonny or iozone which tests
locally mounted file systems.
First I tried to start iozone on many NFS clients hammering the cache file
server.
I got results which are actually meaningless if they are not the same on all
clients.
[...snip...]
Do you know such a tool or are there other ways to get a picture of a IO
capability
of cache-file server?
Thank you and cheers,
Henning
Henning,
Did you run your iozone tests using the multi-client throughput
mode? (-+m and -+t options?) If not, you can set a shell env variable
'RSH=ssh', create a text file listing your desired clients and then run
iozone in clustered mode. The master iozone process will collect the
results for each operation and provide performance as seen by the clients.
--Jeff
--
------------------------------
Jeff Johnson
Manager
Aeon Computing
jeff.john...@aeoncomputing.com
www.aeoncomputing.com
t: 858-412-3810 f: 858-412-3845
m: 619-204-9061
4905 Morena Boulevard, Suite 1313 - San Diego, CA 92117
_______________________________________________
Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing
To change your subscription (digest mode or unsubscribe) visit
http://www.beowulf.org/mailman/listinfo/beowulf
