[Spread-users] Performance Question
John Schultz
jschultz at spreadconcepts.com
Wed Dec 15 17:58:38 EST 2004
Mike Perik wrote:
> I've done another measurement. For ten minutes I
> publish data on 33 groups. The server publishing the
> data timestamps when it sends the message and when the
> client receives the data it timestamps. I diff the
> two timestamps for each message and I'm now seeing an
> average of >.6 sec delivery time. This is still very
> high.
As others have said, on a decent LAN network you should see delivery
latencies on a moderately loaded system of between sub-millisecond and a
few milliseconds. The fact that you are not seeing this probably
indicates that (1) there is a problem with your configuration file (it
doesn't reflect the actual setup of your network but still manages to
work in fall back mode) and/or (2) there are faulty links between some
of the Spread daemons. We can continue to try and help you with (1).
You need to run spmonitor and turn on status reporting for all the
daemons. If you see any of the retrans fields are increasing
significantly (in the hundreds or thousands), then this indicates that
your problem is either 1 or 2 and we can help you figure out which
machines are causing the problems.
Also, if you are willing to post your test programs to the list, we can
run them on our networks and see what kind of performance we get.
--
John Lane Schultz
Spread Concepts LLC
Phn: 443 838 2200
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