Jon, drop a note to the folks at Velocity Software...they probably know
more about Linux performance issues in zSeries than anyone else. They've
just completed a study of how Oracle (not MySQL, I understand) performs
in this environment, and the results might have implications for what
you are attempting.
Their web site is: www.velocitysoftware.com
Hope this is some help.
DJ
Jon Brock wrote:
Actually, this leads me to a related question I have been wanting to
ask: is anyone aware of an analysis of the difference between a
single-IFL vs a multi-IFL system under VM?
We have an application we wanted to bring up under VM/Linux, but when
we tried it we had great difficulty with it and eventually backed it
off. It struck me as peculiar that the image we were using as a
database server (running MySQL) took sometimes 80% of our single IFL.
There shouldn't have been enough database activity to eat that much
CPU. Our CIO chewed off the head of one of the local IBM guys
(unfairly, IMHO) over the whole debacle. It seems to me that having
a multiprocessor system could have made a difference for us, outside
of the obvious doubling of CPU cycles. (The aforenamed now headless
IBM guy had arranged for us to get a loan of another IFL, but the
doctors here were inflicting too much pain on our CIO for him to be
game for the delay it would have meant.)
Would having multiple IFLs have eased our pain in regard to
processing a client-server app? Seems like it would.
Thanks, Jon
<snip> Maybe running only with 1 IFL could be a issue, If you have a
model 230, then you can install 2 IFL´s and try to test the scripts
again. </snip>
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