Re:Re: How to test cache server with historical log?

Thanks, Alex pal!

What is the typical cache size? Do you have any suggestions?

In your reply you mentioned,

/////////////////////////////////////////////////////////////
Many origin server test suites such as HTTP
Blaster can request given URLs through a proxy
/////////////////////////////////////////////////////////////

Whay means "suites such as HTTP Blaster" ? Is HTTP Blaster a software?
Where can I download it?

In your reply, you mentioned,
/////////////////////////////////////////////////////////////
Note, however,
that some origin server owners may be upset if you are not careful
with what kinds of requests you are replaying and how often.
/////////////////////////////////////////////////////////////

What you mean? Is that mean I can mis-use the tools to attack the
origin server?

Best regards,
George, Ma

----- Original Message -----
From: Alex Rousskov
To: maer727@sohu.com
Cc: squid-dev@squid-cache.org
Subject: Re: How to test cache server with historical log?
Sent: Tue Apr 09 22:25:47 CST 2002

> On Tue, 9 Apr 2002 maer727@sohu.com wrote:
>
> > Hi, pals.
> >
> > I am using Squid 2.4 STABLE and enjoy it very much. And another idea arises.
> >
> > Can I use historical log files to test Squid cache hit rate?
> >
> > Where to download log files?
> >
> > What software should I use?
> >
> > My aim is to compare the following three algotithms: LRU, GDSF, LFUDA.
> >
> > Can anyone help me?
>
> I can tell you the result of your future comparison for a typical
> cache size of a correctly configured caching proxy: LRU (with a
> reasonable size threshold), GDSF, LFUDA, and all other reasonable
> algorithms will perform about the same.
>
> If you have an unusual configuration such as a tiny cache, doing the
> comparison may make sense. In that case, you should take special care
> to use traces that contain enough information about requests and
> responses and that have patterns very similar to your environment. The
> results for tiny caches and other unusual configurations can be very
> volatile.
>
> You can use tcp-banger in Squid distribution (squid/test-suite/) to
> replay access logs. Many origin server test suites such as HTTP
> Blaster can request given URLs through a proxy. The next release of
> Web Polygraph will have that functionality as well. Note, however,
> that some origin server owners may be upset if you are not careful
> with what kinds of requests you are replaying and how often.
>
> Alex.
>
>
Received on Tue Apr 09 2002 - 20:41:01 MDT