Reply inline On Tue, 2007-08-21 at 17:24 +1000, Chris Samuel wrote: > On Tue, 21 Aug 2007, Glen Dosey wrote: > > > I've left out a lot of detail to keep this succinct. I can provide > > it when necessary. > > I think the details you've omitted mean there's not enough information > there to actually come to any conclusions! :-) One would might think that ....
> What distro on the clients and servers ? RHEL5 (and RHEL4 to a lesser extent) > What does /proc/mounts say on the clients ? it depends on the test, but the results are almost always the same, I've played with block sizes up to at least 131078. It is NFS v3 over TCP, but like I said, SMB and even scp exibit the same 40MB/s performance on the first read of a file on the server, followed by near line speed performance on subsequent copies when the file size is less than server memory size and has been cached. (again note, I have made sure it is not being cached on the client ) > What is underlying the IP network - 1 gigE, 10 gigE, Infiniband, > Myrinet, Quadrics, quantum carrier pigeons 1GigE and also tried Infiniband, focus on 1GigE > What is the MTU ? 1500, I am looking into jumbo frame support > What is the file system type on the NFS server that you export (ext3, > XFS, JFS, etc) ? Ext3, GFS and XFS (where GFS is slightly slower than the numbers I posted wrt array performance ) > What... is the air-speed velocity of an unladen swallow? :-) Do you mean an African or European Swallow? :) > cheers, > Chris _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
