Re: How to test cache server with historical log?

Dear George,

        You can answer your questions yourself.

        What is a typical cache size? Well, read Squid FAQ, browse
research papers with case studies, or simply search for typical "Web
cache" size using google.com or your favorite search engine.

        What is "HTTP Blaster"? Where can you download it? Well,
again, try to search for it on google.com or your favorite engine!
The search for "HTTP Blaster" phrase (in quotes) on google immediately
gives me useful links (the second match has a description of HTTP
Blaster with a link). You will also find out that the tool is
apparently called HTTP Blast rather than HTTP Blaster.

        Being a newbie is not an excuse for not doing your own part of
the work. You are lucky there are helpful people on this list with
enough time to answer the questions that you can answer yourself, but
that luck might not last, and you will certainly learn more by doing
the legwork.

Alex.

On Wed, 10 Apr 2002 maer727@sohu.com wrote:

> 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 Wed Apr 10 2002 - 09:05:32 MDT