Performance of mv on an NFS mounted partition

[Darrell Robins]

I think that we are suffering from a performance problem when renaming a file on an NFS mounted partition. The synopsis of the processing is to make a file available to a remote process only once it has been successfully copied with the commands:

cp file /nfs/tmp.file
mv /nfs/tmp.file /nfs/file

this appears to be taking longer to perform the mv command than the cp command and I suspect that what is really happening is that the file is being sucked back across into a local area (perhaps /var/tmp) then being pushed to /nfs again. Has anyone got any similar experiences ?

[Rainer_1]

i have no explanation for this behavior but you can try this alternative method

cp file /nfs/tmp.file
ln /nfs/tmp.file /nfs/file
rm /nfs/tmp.file

[Dan Hetzel]

Hi Darrell,

There is a patch related to performance issues under NFS. (PHNE_22125)
http://europe-support2.external.hp.com/wpsl/bin/doc.pl/screen=wpslDisplayPatch/sid=f15d652808f76b8c50

Not sure your 'mv' issue is solved but this patch is worth to be applied for a lot of good reasons ;-)

Best regards,

Dan

PS: The link is for HP-UX 11.0