[CentOS] Yum site cache

[MrKiwi]

<snip>
> Put it in a bash script, enter it into cron, and then it syncs every
> night with a mirror of choice. There's nothing to worry about
> configuring, except an exclude file.
> 
> For example:
> 
> /usr/bin/rsync -v -r -t -p --delete -l \
> - --exclude-from=/usr/local/etc/centos.exclude \
> rsync://one.of.the.mirrors/centos \
> /srv/centos/updates 2>&1 >> /srv/centos/logs/rsync.log
> 
> My exclude file then skips all x86_64, SRPMS, ia64, isos, ppc, dvds,
> etc. and just pulls the rpms and whatever else I only need. Whatever you
> want to skip you can just put in here. Of course, this gets just the
> base CentOS stuff. You can even skip by release if you wanted to only
> get 4.4 stuff.
<snip>

FYI - I used to do this too, then one day the mirror changed 
their config or something and *bam!* - all my repo was nuked!
The cause? - " --delete" worked exactly as expected. However 
from my reading of man rsync there is a flag (--max-delete) 
to ensure that not too many files are deleted at once, so 
that someone elses mirror config errors dont do this to your 
precious 5G of repo.
My advice would be that if your bandwidth is not tooooo 
abundant, lookup this switch: --max-delete=NUM

Oh well *sigh* - bandwidth is cheap i guess.

MrKiwi