John Kordash wrote: >> 2.) Use TCP, UDP Transmits are often slow these days. (mount >> option tcp) > > Hmm, care to share any references for this? I'd be reaching for NFS over > TCP in a long-haul type environment, but would run it over UDP otherwise. At least in my case, both of the vendors I am using for high performance NFS (BlueArc, and Exanet) have tcp as a best practice. Exanet actually runs on top of CentOS 4.4 though does not use the linux NFS stack. These are the options I use for Exanet: rw,bg,hard,intr,tcp,nfsvers=3,timeo=2,retrans=10,rsize=32768,wsize=32768 These are the options I use for BlueArc: rw,bg,hard,intr,proto=tcp,nfsvers=3,timeo=600,rsize=32768,wsize=32768 Exanet is an active-active cluster, the BlueArcs are not configured in any sort of cluster. Planning on retiring the BlueArcs very soon as they are about to be end of life. nate