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Jan Abraham wrote:
>
> > this is one of the longest running unbsolved problems we've ever had :-(
>
> Not anymore. I've solved the issue this morning. Combination of two
> independent problems:
that'll add to the confusion
> Problem A:
> - Poorly written PHP application (lucky me, not my fault...) -> tons of
> PHP includes on every request
lots of disk accesses?
> - Lack of noatime,nodiratime in /etc/fstab
more disk accesses?
> - Use of ext3 with the default data mode (ordered)
what's this about?
> I should be beaten for this. Still, it's a unknown issue why it worked
> well without LVS.
I assume since it's dynamically generated data that you had persistence on,
in which case all requests from a client would arrive on the one machine
just as for a non LVS setup. I don't know either.
> Problem B:
> A switch that mysteriously sends packets to the wrong servers.
:-(
glad you figured it out. I'll put it in the HOWTO sometime as a
gruesome story that turned out not to be LVS, but for which there
was no explanation for quite a while.
Joe
--
Joseph Mack PhD, High Performance Computing & Scientific Visualization
SAIC, Supporting the EPA Research Triangle Park, NC 919-541-0007
Federal Contact - John B. Smith 919-541-1087 - smith.johnb@xxxxxxx
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