nfs performance of 2800.
cap at nsc.liu.se
Wed Jan 10 03:01:02 CST 2007
On Wednesday 10 January 2007 04:42, Ian Mortimer wrote:
> I've been testing nfs performance of a 2800 (RHEL4 x86_64, PERC 4e/Di,
> Raid 5). One simple test (bash loop appending lines to a text file)
> gets these timings:
> to 2800 over nfs: 20.072s
> to old file server over nfs: 4.437s
> (Old file server is 32 bit, 2.4 series kernel)
I think this is the key, 2.4 vs 2.6 or to be more precise, the nfs-utils
version typically shipped with 2.4 vs. that of 2.6. In recent version
(>=1.0.0 according to man exports) the default changed from async to sync.
This has been known to cause the kind of effects you mention. I recommend
reading "man export", especially the part about async.
> Any ideas?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 189 bytes
Desc: not available
Url : http://lists.us.dell.com/pipermail/linux-poweredge/attachments/20070110/b5a7bdd3/attachment.bin
More information about the Linux-PowerEdge