[squid-users] Squid test-suite / benchmarks

Stoica Bogdan Alexandru bogdan.stoica at epfl.ch
Sun Jun 17 08:28:44 UTC 2018

Thank you all for your suggestions. Polygraph is a good benchmark, but unfortunately it has a strict terms & conditions when it comes to publishing results and we plan to make the measurements part of a research paper.

Thanks again!

From: Coenraad Loubser [mailto:coenraad at wish.org.za]
Sent: Thursday, June 7, 2018 11:26 AM
To: Stoica Bogdan Alexandru <bogdan.stoica at epfl.ch>
Cc: squid-users at lists.squid-cache.org; Alex Rousskov <rousskov at measurement-factory.com>
Subject: Re: [squid-users] Squid test-suite / benchmarks

My first port of call would be apachebench with and without your proxies. A web search for "squid apachebench" might yield some leads to people who have done this. (I'm sure apachebench is well tested.)
Eg. the third hit on Google: https://2bits.com/articles/using-apachebench-benchmarking-logged-users-automated-approach.html

On Thu, Jun 7, 2018 at 7:20 PM, Alex Rousskov <rousskov at measurement-factory.com<mailto:rousskov at measurement-factory.com>> wrote:
On 06/07/2018 04:17 AM, Stoica Bogdan Alexandru wrote:

> We’re a small research team interested in benchmarking Squid for a
> research project.

> Ideally, we would like to have good code coverage while doing so.

> Are there any good benchmarks used for such purpose?

Performance benchmarks usually focus on things other than code coverage.
It is very difficult to write a quality benchmark for a proxy, even
without code coverage as a goal!

One the other hand, a decent proxy benchmark has enough knobs to tickle
most "interesting" code paths in Squid (or any other proxy). Web
Polygraph[1] (mentioned on this thread earlier) is a good example -- you
can trigger cache revalidation, simulate heavy tailed hit distributions
that stress disk caching, exercise the code that handles aborted
transactions, persistent connection races, etc., etc.

> Or, even better, is
> there a more comprehensive test suite apart from the one Squid comes with?

Squid does not come with a comprehensive test suite (yet) and the tests
distributed with Squid are not performance tests (a.k.a. "benchmarks").
If you are looking for functionality rather than performance testing,
then there is Co-Advisor[2]. Squid is tested with Co-Advisor, but those
tests have not been automated (yet).

  [1] http://www.web-polygraph.org/
  [2] http://coad.measurement-factory.com/


P.S. Disclaimer: The company I work for is responsible for both of the
test tools mentioned above.
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