RHEL 5.0 NFS

[Matt Brown (Sky Road LLC)]

It is performance issues or directly related to nfs4?
If it is performance related take a look at this document:
http://www.redhat.com/f/pdf/rhel/Oracle-10-g-recommendations-v1_2.pdf

I know this is for Oracle, but take a look at the default scheduler and other things in the document we are running Oracle databases off of NetApp NAS devices and had terrible performance issues and this document solved a lot of those. If you Google NFS performance issues Red Hat 5 you will see the kernel has a lot of issues that are said to be fixed, but never seem to be actually corrected.

To turn NFSv4 off you should be able to:

Add the this line to /etc/sysconfig/nfs
RPCNFSDARGS="-N 4"
Then restart nfs
Stop rpcidmapd service and chkconfig it off

Matt

From: redhat-sysadmin-list-bounces at redhat.com [mailto:redhat-sysadmin-list-bounces at redhat.com] On Behalf Of nitin.gizare at wipro.com
Sent: Wednesday, October 27, 2010 10:43 AM
To: redhat-sysadmin-list at redhat.com
Subject: RHEL 5.0 NFS

Hello

We have Linux servers with RHEL 4.0x version running nfs version 3 has nfs servers.
We have added new servers with RHEL 5.0 version.
When I do ps -ef | grep nfs  I see that nfsd4 is started .
We  are facing lot of nfs issue on dir which are shared from RHEL 5.0.

Please help me disable nfs version 4 if by default started in RHEL 5.0 so that we can use nfs version 3 in RHEL 5.0.




Rgds

Nitin




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