[Spread-users] Performance
Yair Amir
yairamir at cnds.jhu.edu
Mon Jul 29 11:35:53 EDT 2002
Are all of your machines the same speed and all of them empty?
There are some tuning to make Spread run faster than the
out-of-the-box performance, because the out-of-the-box is designed to
work without many people contacting us. From your numbers, you have
substantial decrease, so you probably have another problem - probably
uneven machine power or too many losses on a machine, etc.
3.16.2 has no problem to support 100 receivers but not if each of them
is running on a different machine. For that you need a smarter design.
(or a more scalable version). I would also go with smaller messages in
case you have a problem with IPC queues (assuming you are using IPC
and not TCP for the local connections).
:) Yair.
Jan> hello list!
Jan> we did some spflooder tests and we were increasing the number of hosts (linux).
Jan> we realized, that spread seams to get slower by each added host.
Jan> 1.000 messages/100.000 bytes - time is averaged for all hosts
Jan> freiburg -> okinava
Jan> 15.831 ms (48,19 Mbps)
Jan> 15.251 ms (50,20 Mbps)
Jan> 15.269 ms (49,96 Mbps)
Jan> freiburg -> okinava, galway
Jan> 17.898 ms (42,62 Mbps)
Jan> 18.123 ms (42,90 Mbps)
Jan> 18.482 ms (41,28 Mbps)
Jan> freiburg -> okinava, galway, qosqo
Jan> 21.143 ms (36,80 Mbps)
Jan> 21.159 ms (36,50 Mbps)
Jan> 20.365 ms (37,46 Mbps)
Jan> freiburg -> okinava, galway, qosqo, teguise
Jan> 25.692 ms (29,69 Mbps)
Jan> 25.663 ms (29,72 Mbps)
Jan> 25.075 ms (30,42 Mbps)
Jan> we are using spread-src-3.16.2.tar and our spread.conf looks like this:
Jan> Spread_Segment 224.100.100.224:6824 {
Jan> freiburg 172.27.27.27
Jan> okinava 172.27.27.28
Jan> galway 172.27.27.29
Jan> qosqo 172.27.27.30
Jan> tequise 172.27.27.31
Jan> }
Jan> but the main question is, how is it possible to increase spread's performace?
Jan> we will have just *1* sender and up to *100* receivers in our scenario.
Jan> and another question, does spread nead a lot of resources(cpu, memory)?
Jan> regards, jan
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