NFS performance testing !

[Bugs_Bnny]

Hi Guys,

Could somebody guide me on measuring NFS performance on HPUX. I need to evaluate and document performance on NFS. Currently i am using nfsstat...but it is not very clear. If anybody can give me any insight on any other ideas/tools/utils ..etc, it will be of great help to me.
Thanks,
Bgs_bnny

[James Murtagh · Accepted solution]

Hi,

This document should be your first port of call:

http://www.docs.hp.com/hpux/onlinedocs/1435/NFSPerformanceTuninginHP-UX11.0and11iSystems.pdf

Regards,

James.

[Michael Steele_2]

What's Up Doc?

Make a big file and call it 500meg:

prealloc /tmp/500meg 5000000

Copy /tmp/500meg in and out of your NFS file system from the client side and note these stats:

nfsstat -rc (* timeout and retrans *)

netstat -m (* number of requests for memory denied *)

vmstat -n 5 5 (* %idle = 0 or low? *)

nfsstat -s (* readlink and lookup calls nearly equal? 'getattr > 60% then not caching enough *)

nestat -s -p udp (* overflows high ? Not enough nfsd daemons; start more in nfsconf *)

[Bill Hassell]

NFS performance is very difficult to characterize as it is a stateless connection and can be heavily affected by the LAN topology. And there are a number of tunable items that may be required for best performance. I would certainly not depend on a single performance figure except perhaps on a dedicated LAN connection.

This book is invaluable for NFS:

"Optimizing NFS Performance: Tuning and Troubleshooting NFS on HP-UX Systems" by David Olker

[Orlando-Torres]

Hello,

I'm trying so hard to find this book "Optimizing NFS Performance: Tuning and Troubleshooting NFS on HP-UX Systems" by David Olker

in PDF format, or any other document about performance NFS from Dave Olker, but no find anything.

Can someone please help me with this old 2002 pdf, to tune fine my system.

Thanks in advance.

[Dave Olker]

Hi Orlando. 

I know that guy.  I'll talk to him about getting you a copy.  ;)

Send me an email - Private Info Erased - and I'll send you the PDF version.

Dave

[Orlando-Torres]

Thank you Dave.