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

Thanks, Alex pal!

Your suggestions are very useful. Let me follow it. :-) If I
meet further troubles. I hope you can help me.

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: Wed Apr 10 23:05:06 CST 2002

> 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 - 20:35:54 MDT