Re: [squid-users] squid freebsd aufs + coss - same hd

and losing the cache swap log just triggers a rebuild. You won't lose
the cache, just time.

Yes you have to set the swap state directories when using COSS.

Adrian

On Fri, Dec 07, 2007, Amos Jeffries wrote:
> > rebuild of coss take longer time... about 30 mins to rebuild 6gb (with
> > configs posted previously)...
> >
> > correct ?
> >
> > i will loose my cached files (aufs) if cache_swap_log is set to the
> > same location of old swap file ?!
>
> 1) cache_swap_log is obsolete. Its now cache_swap_state to better reflect
> the file to which it applies, and that the file is NOT a normal log file.
>
> 2) Better leave the cache_swap_log/cache_swap_state at defaults (missing
> from squid.conf) for squid to handle it safely.
>
> 3) What Adrian meant was the order of the lines in squid.conf. Not an
> actual re-ordering of cache-dir. This is a major reason for #2, so a
> re-ordering in the config does not screw up the custom state file
> numbering.
>
>
> Amos
>
> >
> > thanks !
> >
> > regards
> >
> > Alexandre
> >
> > On Dec 6, 2007 8:50 AM, Adrian Chadd <adrian@creative.net.au> wrote:
> >> cache_dir's are 'checked' in order; I suggest putting the coss
> >> directories
> >> first.
> >>
> >>
> >>
> >> adrian
> >>
> >>
> >> On Fri, Dec 07, 2007, Amos Jeffries wrote:
> >> > Alexandre Correa wrote:
> >> > >can 2 cache_dir on the same hd (dedicated for squid) cause
> >> performance
> >> > >impact ?
> >> > >
> >> > >i?m using cache_dir aufs ... and cache_dir coss (objetcs smaller than
> >> > >1000k)
> >> > >
> >> > >cache_dir aufs /var/spool/squid/cache 110000 32 256
> >> > >cache_dir coss /var/spool/squid/onda_coss01 6000 max-size=1000000
> >> > >maxfullbufs=4 membufs=20 block-size=4096
> >> > >
> >> > >
> >> > >thanks !!
> >> > >
> >> >
> >> > Looks good. Just some hints though...
> >> >
> >> > You'd do well to set min-size on the AUFS dir, to push the smaller
> >> > objects into COSS. At present small objects can go to either, and
> >> large
> >> > only in AUFS.
> >> >
> >> > A 4KB block-size may cause a lot of watse if you get a large number of
> >> > small objects such as optimized web pages or spacer images. The
> >> default
> >> > 512 is sufficient for COSS dir up to 8GB large
> >> > Not worth changing it now though if any important data has
> >> already
> >> > gone to COSS. Would require a destroy and rebuild to fix that.
> >> >
> >> > Two on same HDD might drag each other down a little, but no more than
> >> a
> >> > single large cachedir doing the same throughput. Unfortunately squid
> >> is
> >> > not head-optimised for disk usage yet. COSS is more in-memory than the
> >> > others so it should still be a net gain over a single pure aufs.
> >> >
> >> > Amos
> >>
> >> --
> >> - Xenion - http://www.xenion.com.au/ - VPS Hosting - Commercial Squid
> >> Support -
> >> - $25/pm entry-level VPSes w/ capped bandwidth charges available in WA -
> >>
> >
> >
> >
> > --
> >
> > Sds.
> > Alexandre J. Correa
> > Onda Internet / OPinguim.net
> > http://www.ondainternet.com.br
> > http://www.opinguim.net
> >
>

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