Performance Tuning Recommendations for a RHEL 4 NFS Fileserver

Amina_Saify at Dell.com Amina_Saify at Dell.com
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.
<http://www.dell.com/downloads/global/power/ps4q06-20060426-Gulbeden.pdf
> We also have a reference guide for MD1000 on optimizing the
performance
<http://support.euro.dell.com/support/edocs/systems/md1000/wh_paper/wh_p
aper.pdf> 

Hope this helps!
Amina


-----Original Message-----
From: linux-poweredge-bounces at dell.com
[mailto:linux-poweredge-bounces at dell.com] 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
Fileserver

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.

-Aaron


Stephen John Smoogen wrote:
> On 12/1/06, Mansell, Gary <Gary.Mansell at ricardo.com> 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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