Re: capacity planning question (fwd)

Have a look at
http://ww.cs.ubc.ca/spider/marwood/Projects/SPA/index.html,
and more importantly
http://www.cs/ubc.ca/spider/marwood/Projects/SPA/Report/Report.html

This is the Squid Proxy Analysis page, and can help with understanding
how to make a cache perform better. It helped me work out quite
a lot about my squid cache - although I recon I have more disk space
then I need.

Also, there was a figure floating arround the list quite a few times
- 8 Megs of Ram per disk is the minimum practical amount, and will
probably be a driving factor in the amount of hard drive space you
should set aside.

Cheers,
David

On Sat, 18 Dec 1999, Kendall Lister wrote:

> On Fri, 17 Dec 1999, Terence Kelly wrote:
>
> > However I haven't been able to infer from scattered data like this
> > the principles that admins apply when deciding how much RAM & disk is
> > appropriate for a cache serving a given workload.
>
> A recently suggested rule of thumb is that you want to be able to store 3
> - 5 days worth of traffic; if you are serving 1.5 Gb per day, you will
> get optimal caching vs cache size by using 5 - 10 Gb of disk storage. This
> will then require that you have enough RAM to hold approximately 4 -
> 800,000 objects, at something 100 bytes per object, i.e. 40 - 80 Mb plus
> sundry storage and processes.
>
> I hope my (very) rough figuring isn't too far wide of the mark.
>
> --
> Kendall Lister, Systems Operator for Charon I.S. - kendall@charon.net.au
> Charon Information Services - Friendly, Cheap Melbourne ISP: 9589 7781
>
Received on Fri Dec 17 1999 - 20:53:04 MST