Steve Bertrand wrote:
Hi everyone,
I see what I believe to be less-than-adequate communication
performance between many devices in parts of our network.
Can someone recommend software (and config recommendations if
possible) that I can implement to test both throughput and pps
reliably, initially/primarily in a simple host-sw-host configuration?
Perhaps I'm asking too much, but I'd like to have something that can
push the link to it's absolute maximum capacity (for now, up to 1Gbps)
for a long sustained time, that I can just walk away from and let it
do it's work, and review the reports later where it had to scale down
due to errors.
What I'm really trying to achieve is:
- test the link between hosts alone
- throw in a switch
- test the link while r/w to disk
- test the link while r/w to GELI disk
- test the link with oddball MTU sizes
Iperf or netperf are probably what you're looking for. Both try real
had NOT to tweak other subsystems while they run, so if you want to
throw disk activity in, you'll need to run another tool or roll your own
to create disk activity. You probably don't want to run them for
extended periods in a production network. Depending on the adapters at
each end, you may or may not be able to drive the link to saturation or
alter frame size. The Intel adapters I've seen allow jumbo frames, and
generally good performance (as opposed to say the realtek). It's also
useful to have a managed switch in between so you can look at the
counters on it.
jim
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