Le Tuesday 08 March 2011 14:58:18 John Drescher, vous avez écrit :
> On Tue, Mar 8, 2011 at 8:24 AM, Laurent HENRY <Laurent.Henry AT ehess DOT fr> 
wrote:
> > Le Wednesday 02 March 2011 20:50:18 Mark, vous avez écrit :
> >> > btw, i actually experience it with disk backups.
> >> > Does this mean software compression limits deeply backup speed ?
> >>
> >> In my case, software compression was a _massive_ slowdown, to the point
> >> that my preference was to throw more disk space to bacula to keep my
> >> jobs completing in a reasonable time.  This was backing up a server with
> >> a couple hundred gigs of large files, not tons of small files.
> >>
> >> Try your job without compression enabled at least once, to get yourself
> >> a good comparison.
> >>
> >> Mark
> >
> > Turning compression off on disk backup definitely improve the
> > performance. I was at 17MB/s and now i am at 30 MB/s.
> >
> > On my network graphs i still see i don't often go beyond the 100Mb/s i
> > don't find any explanation on the network side.
>
> Do you have attribute spooling enabled? If not enable that.
>
> John

I tried to enable spooling (500 Gb spool) for the tape backup. The perf were 
worse.

For disk backup, it seems to me spooling does not make sense.

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