You can use 32K.

1. Upgrade to 5.3.5/5.3.5P2--it is the default, at least for these releases

2. turn on the option: options nfs.udp.xfersize 32768

Now you can mount with r/wsizes greater than 8K.

--tmac

"Rainchik, Aleksandr (MED, Non GE)" wrote:

Hi,

We have brand new E450 running Solaris 7 and NetApp Release 5.3.4R3 and we are planning to use NetApp as a ClearCase VOB storage. Both are on 100mb/full switched fast Ethernet.

I was trying to play with Postmark to identify what is best for performance, like NFS2 or NFS3? TCP or UDP? What values for rsize or wsize?

     r/wsize  TPS    read    write

---

NFS3 UDP 8K 38 223.42 720.64 NFS2 UDP 8K 3 13.81 44.53 NFS3 TCP 32K 2 12.67 40.86 NFS2 TCP 8K 2 13.14 42.39

a) For some reason, the best results I've got was with -o vers=3,proto=udp. NFS2, or NFS over TCP looks like a joke... It's like 20 times slower.

b) There is no way to use w/rsize=32768 with NetApp with NFS3 over UDP. Why? I can do it when mounting from Solaris.

Any comments?

Thank you.

-- ******All New Numbers!!!****** ************* *************

Timothy A. McCarthy --> System Engineer, Eastern Region Network Appliance http://www.netapp.com 240-268-2034 Office \ / Page Me at: 240-268-2001 Fax / 888-971-4468