[Beowulf] diskless cluster nfs
csamuel at vpac.org
Tue Dec 7 15:23:00 PST 2004
On Wed, 8 Dec 2004 09:23 am, Josh Kayse wrote:
> Master node: system drive is 1 36GB SCSI drive
> /home raid5 5x 36GB SCSI drives
What distro, kernel and filesystem are you using ?
> all of the nodes are diskless and get their system from the master
> node over gigabit ethernet.
Is your network infrastructure capable of jumbo frames ?
> The engineers use files over nfs for message passing, and no, they
> will not change their code to mpi even though it would be an
> improvement in terms of manageability and probably performance.
You have my considerable sympathies. :-)
> Basically, my question is: what are some ways of testing the
> performance of nfs ande then, how can I improve the performance?
A good start is the NFS Performance HOWTO at:
A lot of folks report that XFS makes a superior underlying FS for NFS than
ext3 and we're planning to use that on our next NFS server we build.
> Thanks for any help in advance.
> PS: nfs mount options: async,rsize=8192,wsize=8192,hard
> file sizes: approx 2MB
Out of interest, what does /proc/mounts say when you do and when you don't
specify the rsize and wsize when mounting the filesystem ?
Christopher Samuel - (03)9925 4751 - VPAC Systems & Network Admin
Victorian Partnership for Advanced Computing http://www.vpac.org/
Bldg 91, 110 Victoria Street, Carlton South, VIC 3053, Australia
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