On Feb 1, 2008 10:54 AM, Johnny Hughes johnny@centos.org wrote:
Bent Terp wrote:
Good point, thanks Johnny! We've verified that here; problem does not occur when mounting a Linux nfs-share, and does occur when mounting a Celerra nfs-share.
Tunrs out that nfsstat wasn't telling us the whole truth.... We set up an rsync that only did the directory listing, and the .4 => .6 kernel "opgrade" (and I use the term loosely...) resulted in that rsync command taking 21 secs instead of 4.5 against a Linux nfs backend; and 20 secs instead of 10 against the celerra.
I've opened a Service Request @ EMC, and will post here again when relevant.
Issue remains open, although I'm sligthly embarassed about it now, given that linux backends are also affected.
When we built a .6 kernel without the 5 nfs patches, nfsstat output reverted, but I don't know about the actual performance, yet. Probably we can rerun those tests monday.
BR Bent