Paul Taylor wrote:
We have been having some performance issues lately, and I was looking through some documentation that I got when I went to the NetApp 202 class. It says that the udp window should 32k except if you have a FDDI card or rampant packet loss. You set this with:
options nfs.udp.xfersize <value>
Anyone had any experience setting this? can we do it on a production filer and not crash? Can we set it back and still not crash if it does something horrid?
I had no trouble enabling it on a production filer (F760 cluster, in this case). It helped only NFS v3. In fact, our news farm runs NFS v2 on UDP because of horrible performance running any form of NFS v3 between Solaris 2.6 and the filers. I have one machine tightened to 512-byte transfers because of poor performance at bigger transfer sizes.
I'd welcome discussion on this, if anyone wants to take it to a new thread.