topic Re: Parameters NFS Volume in Operating System - Linux

Parameters NFS Volume

Alexander Fedyashov — Wed, 12 Dec 2007 21:59:15 GMT

I want to mount an NFS volume to share a application tier between 2 servers. What NFS mount parameters would I use for optimal performance. Any help would be appreciated.

Thanks,
Alex

Re: Parameters NFS Volume

Stuart Browne — Wed, 12 Dec 2007 23:01:34 GMT

Oh, that is such an open ended question, that it is near impossible to answer accurately.

I'm assuming you've done an optionless mount, and it isn't performing well?

What options have you tried?

What sort of sizes of data are you trying to load over the NFS (saying 'application tier' doesn't help too much)? Are we talking about 100's of KB, or MB?

Re: Parameters NFS Volume

Matti_Kurkela — Thu, 13 Dec 2007 15:46:53 GMT

More questions:
When an application performs a disk operation, is it typically a small operation (e.g. write one line of text to a log file) or a large one (e.g. read several megabytes of data at once)?

Which version of NFS protocol are you using?
(NFS v2 is the oldest version, NFS v3 is newer and allows improved performance, NFS v4 is bleeding-edge and very different from the older versions, maybe not quite ready for production yet?)

The man pages ("man mount" and "man 5 nfs" both) say that options "rsize=8192,wsize=8192" would improve throughput "greatly".

MK

Re: Parameters NFS Volume

Ivan Ferreira — Thu, 13 Dec 2007 15:59:25 GMT

I would use NFSv4 as it performs the same operations using less daemons, and performing more request on each connection than previous versions (allows combining several basic NFS ops (LOOKUP, OPEN, READ, etc.) into a single
complex RPC operation). The locking mechanism is also improved.

Re: Parameters NFS Volume

skt_skt — Fri, 14 Dec 2007 00:45:58 GMT

use this options.

type nfs (rw,nosuid,nolock,soft,rsize=8192,wsize=8192)