On Fri, 7 Jul 2000, Stephen J. Wilcox wrote:
Does anyone know if there are ways to tweak extra performance out of a C720? I'm thinking about adding more RAM, can it take more and does it improve things? Any other thoughts?
I've played extensively with an F740, trying to squeeze every last op out of it...
o The F740 comes with 512 MB of RAM. We stuffed it with 1 GB of RAM (unsupported) and got 10-20% more ops out of it. This was the single biggest improvement we got, short of the inevitable and unpalatable "upgrade your filer to an F740/F760" solution.
o Turn off TCP for NFS. UDP has much less overhead.
o Turn on "minra" for your volume(s).
o Make sure "checksum_blocks" is off (default) for your volume(s).
o Offload some of the network load to the Gigabit NIC's (see below).
These have pros and cons, so careful, judicious, and documented changes, with monitoring and numerical results, will really help to determine if it does anything for you.
See the notes of this page:
http://www.spec.org/osg/sfs97/results/res98q3/sfs97-980805-00006.html
for some explanations of these.
Until next time...
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