Performance Tuning Recommendations for a RHEL 4 NFS Fileserver

Amina_Saify at Amina_Saify at
Fri Dec 1 11:33:37 CST 2006

Also, refer to the PowerSolution article on SAS storage in HPC, which
talks about general performance tuning of storage as well.
> We also have a reference guide for MD1000 on optimizing the

Hope this helps!

-----Original Message-----
From: linux-poweredge-bounces at
[mailto:linux-poweredge-bounces at] On Behalf Of Aaron McKinnon
Sent: Friday, December 01, 2006 11:26 AM
To: Stephen John Smoogen
Cc: linux-poweredge-Lists
Subject: Re: Performance Tuning Recommendations for a RHEL 4 NFS

Be sure the clients are running over TCP and up the rsize and wsize to
something like 32K (client side). It's a two way street... RHEL4WS
should do all of this by default.


Stephen John Smoogen wrote:
> On 12/1/06, Mansell, Gary <Gary.Mansell at> wrote:
>> Dear all,
>> I am about to implement a Dell PE2950 with 4GB RAM attached to an 
>> MD1000 array with a 15 300GB SAS Drives in a RAID 5 config via a
PERC5/e card.
>> The machine is to act as an NFS fileserver for about 100 UNIX and 
>> Linux machines and also as a Samba Server for about 100 PC's.
>> I would be interested to hear any recommendations as to tuning 
>> parameters that I should incorporate into the configuration.
>> I expect to increase the number of nfsd's from the default 8 to 16 
>> (will this be enough?), will mount with noatime, will tune2fs the 
>> filesystem so that it does not get automatically fscked at boot.
>> Are there any other NFS tuning ideas, IO subsystem tuning and Network

>> Tuning Parameters that I should consider?
> NOTE: I have not tested this myself.
> >From what I can tell on other Linux mailling lists, you will want to
> avoid LVM/LVM2 as a subfilesystem on the partition you are exporting.
> Instead use a direct ext3 partition on this hardware. Also  making 
> sure that the RAID cache is set appropriately for async/sync helps 
> greatly also.

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