Red Hat Bugzilla – Bug 71661
NFS performs extremely slow 200~300k/s
Last modified: 2007-11-30 17:06:52 EST
NFS server and clients are connected with a single 3com 1700 giga switch. All
machines are installed with broadcom giga network adapter.
OS: Both sides are Red Hat AS 2.1 with updated kernel from Red Hat, 2.4.9-e.8
No other special configuration.
NFS start and mount normally. But transfer speed is quite slow, only
200~300KB/s. ifconfig shows no erros, drops, overruns...
I am sure it's not network problem, ftp, sftp, ftp runs normally
I Have tried to:
set rsize,wsize to 8k or 32k
set sync, async
None of the above works.
I think it's a Kernel problem
After upgrading kernel to 2.4.18-7, the problem was solved.
Transfer speed bursts upto 40MB/s under mount option as:
mount -o rw -o nfsvers=3 -o tcp -o hard -o async -o rsize=32768 -o wsize=32768
Lots of NFS performance work was done to AS2.1 over the past
several kernel errata. Is this still a problem with the e.24
closing due to inactivity