Re: Performance measurement of redirectors?

From: Alex Rousskov (rousskov@measurement-factory.com)
Date: Fri Nov 03 2000 - 09:11:42 MST


On Fri, 3 Nov 2000, Thomas Proell wrote:

> I have installed the Linux Virtual Server. This software redirects
> incoming requests to several servers. Load is distributed this way.
>
> Now, I wonder if I can use the Web Polygraph to measure the possible
> throughput. Is this possible with the redirection/traffic split?

It is possible. Traffic redirection can be tested with WebAxe or
PolyMix workload. Traffic split can also be tested, I think. Polygraph
servers can be configured to have identical or different "data sets".

"Transparent" redirection to a proxy or proxies (including Web
accelerators, aka reverse proxies) works without problems with
2.5.4.

Server load balancing (SLB) configurations (a VIP without a proxy in
the middle) are possible to test, with some errors reported by the
clients. Polygraph can be tricked into thinking that VIP is an actual
server (just add a "fake" server bounded to VIP into the PGL
configuration). However, that trick leads to a few errors on the
client side.

I would be happy to try to help you to get your particular setup
working. Alternatively, we may be able to run the tests for you. You
may also find the following info useful:
        http://www.measurement-factory.com/L4/

Thanks,

Alex.

P.S. If you need to use WebAxe workload with 2.5.4,please let me know
and I will send you a working version; webaxe-1.pg in the distribution
needs some minor tuning before it will work with 2.5.4...



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