Re: How big should be cache_dir ?

[Peter Smith <peter.smith@xxxxxxxxxxxxxxxxxx>]

Martin Sevigny wrote:

> Hello all,
> <snip>
> - is it better to have 10 cache-dir of 100GB or 1 cache-dir of 1TB 
> (for instance)?
>
> - expected average size of entries in the cache will be around 100KB, 
> which means that a 100GB cache will hold around 1 million entries... 
> are there any issues (memory?) with these numbers? I've tested 100 000 
> entries with success (and very good speed) but 1 million or more?

I could be wrong, but I think the number of directories is configurable 
is so that you as an administrator can have greater control over the 
layout of the cache-dir..  It would depend on how often you access the 
cache-dir, what type of filesystem you are running on it, and also how 
many files you expect to have in each directory.  Some filesystems 
prefer different structures, and some even have limits (for instance the 
maximum number of files in a directory.)  All of these things can 
determine how quickly Squid can rebuild or shutdown the cache, and open, 
create, or remove cache files..  For your setup I'd imagine you probably 
don't need to worry too much.

HTH,
Peter