[Spread-users] spread performance looks not very good for me

[wei_hu at agilent.com]

Spread performance question:

I am doing some investigation on spread to decide if it could be used as middleware in our project.  I studied spread for two days and did some benchmark.  I do have some questions.  Appreciate any comment on them.

To do the benchmark, I used one Solaris machine as Sender and other one/two machines as Receivers.  All machines are in one subnet. Spfloor in spread package was used as benchmark program.  There is average message rate I got.  Message size was 1K.
1 sender + 1 receiver: 19.07 Mbps
1 sender + 2 receiver: 13.46 Mbps
The sender and one of the receivers is 500Mhz CPU, 1G memory, Solaris OS.  Another receiver is 500Mhz CPU, 512M memory, Solaris OS.

My question is:
1.	The message transmitting rate is far below what is claimed in "Spread Overview" (8K 1Kbytes per second).  Any possible reason for that?
2.	Why plugging in more receivers decreased the message transmitting rate?
3.	Spread daemon burned up to 70% CPU time?