[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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