On Tue, 9 Mar 2004, Errol Casey wrote:

On Tue, 9 Mar 2004, Magnar Stav Johanssen wrote:

...

Hi

I'm currently running OnTAP 6.4.3 on my 760c. I've got 3 servers (Solaris 9) running postfix with high volum of mail. These 3 machines alone uses all free CPU on one of the nodes in the NetApp-cluster.

Are you only running the MTA on the client machines , or are you also possibly using qpopper also on your client machines? If you are using qpopper -- look into the fast-update (-F) and server mode (-S) options. We gained back 40-50% of our filer NFS clients.

This should have stated, we gained 40-50% of our filer CPU back; as well as decreased cpu load on the NFS clients. The I/O generated by customers actually popping their mail was generating more I/O than the I/O being generated by the mqueue files by sendmail by our mail servers on our F825 filer.

Hope this helps.

you should use nfs over tcp and not over udp and after tri to pass r/wsize to 16384 and to 32768

Magnar Stav Johanssen wrote:

On Wednesday 10 March 2004 04:49, Errol Casey wrote:

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On Tue, 9 Mar 2004, Magnar Stav Johanssen wrote:

...

Hi

I'm currently running OnTAP 6.4.3 on my 760c. I've got 3 servers (Solaris 9) running postfix with high volum of mail. These 3 machines alone uses all free CPU on one of the nodes in the NetApp-cluster.

Are you only running the MTA on the client machines , or are you also possibly using qpopper also on your client machines?

The clients are only running MTA!

This is our mount-options for the clients: rw,nosuid,intr,grpid,proto=udp,xattr,rsize=8192,wsize=8192

(The performance was even lower when mounting: rw,nosuid,intr,grpid,proto=udp,xattr -> nfsv3, rsize = wsize = 32768)

On Tuesday 09 March 2004 23:22, Neil Stichbury wrote:

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How are your minra and atime settings ?. What are your rsize and wsize ?. Using tcp or udp ?.

As you can see of the mount-options used by the clients:

• rsize and wsize are 8192 bytes
• we uses udp.

Setup of the filer:

filer> vol status -v Volume State Status Options vol0 online normal root, diskroot, nosnap=off, nosnapdir=off, minra=off, no_atime_update=off, raidsize=14, nvfail=off, snapmirrored=off, resyncsnaptime=60, create_ucode=off, convert_ucode=off, maxdirsize=10240, fs_size_fixed=off, create_reserved=off, raid_type=RAID4

           Plex /vol0/plex0: online, normal, active
               RAID group /vol0/plex0/rg0: normal
               RAID group /vol0/plex0/rg1: normal

filer> options nfs. nfs.ifc.xmt.high 16 nfs.ifc.xmt.low 8 nfs.kerberos.file_keytab.enable off nfs.kerberos.principal nfs.kerberos.realm nfs.locking.check_domain on nfs.mount_rootonly on nfs.mountd.trace off nfs.per_client_stats.enable on nfs.require_valid_mapped_uid off nfs.tcp.enable on nfs.udp.enable on nfs.udp.xfersize 32768 nfs.v2.df_2gb_lim off nfs.v3.enable on nfs.v4.enable on nfs.v4.id.domain *****.no nfs.webnfs.enable off nfs.webnfs.rootdir XXX nfs.webnfs.rootdir.set off

Regards, Magnar