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On Wed, 8 Apr 2009, netadmin @dslextreme.com wrote:
> I setup a computer has two 1GB interfaces, doing NAT mode,
> when sending traffic to it from Load Runner to the server,
> I saw the traffic going up and down between 1000 to 1500
> transactions per second, not very stable. If I just use
> the same computer as router
as a NAT router?
> the traffic chart is much flat and get about 2000
> transactions per second.
> I also tested the max concurrent connection using IXAX
> tester, it limited to about 3 million and no matter how
> much memory on the sytem, it will not go up. The new
> connection per second rate is also about 6k/s.
and if you change the director to a NAT router what numbers
do you get?
> I also noticed 2.4 kernel LVS works better than 2.6 kernel
> on the same hardware, performance wise.
that's interesting to know. How much better? I remember a
long time ago someone staying with a 2.0.36 kernel because
it ran LVS much faster.
> From those tests, I think there are some limit in
> somewhere, especially the trsanaction rate with and
> without LVS having that much differences.
It's good to have data. Most people don't run tests like you
have and send us the results. Much of the current code was
developed on machines running at 100-400MHz. Much of the
effort is put into making sure that LVS is not the rate
limiting step in the flow of packets through a director.
However the code is not put through a battery of speed
tests.
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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