In article 377EAC7D.F9A866D1@netapp.com, Timothy Moore wrote:
I've seen sustained 14MB/s across a point-to-point connection using Alteon GbEs in this configuration:
Switched 100Mb network either intel eepro or realtek 8139 network cards. kernels 2.2.9, 2.2.10 or any of the recent 2.2 kernels.
mount: rw,rsize=8192,wsize=8192,bg,hard,intr,udp,nfsvers=3
defaults or that same config only yields around 1.5Mb/s for large sequential reads. I've tried pretty much every option I can on the mount and nothing gets any better.
filer: 760, OnTap 5.3
540, 4.3 typical sysstat output: CPU NFS CIFS HTTP Net kB/s Disk kB/s Tape kB/s Cache in out read write read write age 26% 526 0 0 545 2175 2182 462 0 0 1 24% 526 0 0 521 2194 2021 450 0 0 1
Of course for the workload we want to use (lots of concurrent, random 8k reads) things are even worse. If I didn't know better I would say that the machines were actually on switched 10mb rather than 100mb network. hohum.