NFS mount options

I just bought a Qnap NAS box that I want to share with 2 VM hosts.   I did a little research on NFS vs iSCSI and it seems that NFS has some pretty good advantage over iSCSI.  Especially when she is on a network to shared resources.

The hosts are the two Centos 5.3.

I wonder what would be the optimum settings (options) for the NFS mount?  I found a couple of some old site, but I wonder what people here use?  Here's a setting string that I found:

nfsvers = 3, tcp, timeo = 600, TRANS = 2, rsize = 32768, wsize = 32768, hard, intr, noatime

I'm heading to the coast to look at the man page for NFS now to see what these all mean...

Thank you

Phil

Here's a good explanation of this thing:

The nolock option prevents the sharing of file locking

information between the NFS server and the NFS client. The server is

unaware of the file locks on this client and vice versa.

Using

the nolock option is required if the NFS server has its NFS file lock

the feature in a State broken or remained dead letter, but she works between

all versions of NFS.

If another host is accessing the same files that

your app on this host, there may be problems if file locking

information sharing is disabled.

Failure to maintain good

blocking a write operation to the same host with a read operation on

another may cause the reader to have incomplete or inconsistent data

(reads a structure of data/record/line that is written only in part).

A

locking failure between two writers is likely to have data

loss/corruption, such as the later writing replaces the previous one. The

changes made by the previous write operation may be lost.

-

Tags: VMware

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