NFS file copy too slow

[kaushikbr]

Hi all,

We are using NFS over WAN and trying to copy few files over in the production environment. This approach seemed to work for us for the last couple of years without any problem. However we are witnesing a strange problem now.

When I try to copy the file from a NFS to a local filesystem, the copy surges off at around 1200 - 1300 bps ( monitoring the I/O using iostat 5 ) and it drops down to 100 odd bps.

When I ftp the file over the same file is ftp'ed in about 10 minutes ( file size is about 1.4 GB and this file we are using for testing/ investigating the problem, for the application we have to transfer 28GB of data over NFS ), but the unix copy seems to takes forever. I am not sure how to debug this problem.

I'm afraid some of our applications are based on NFS we cannot use ftp at the moment to transfer the files.

Thanks and regards
Kaushik

[Pete Randall · Accepted solution]

If you have a support contract, you can check the Technical Knowledge Base for documents related to "NFS tuning", like this:

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=emr_na-c00904694-3

DocID: KBAN00000261


Pete