Amanda-Users

Re: To use or not to use DAT drive compression

2002-08-07 19:35:34
Subject: Re: To use or not to use DAT drive compression
From: Jay Lessert <jayl AT accelerant DOT net>
To: amusers <amanda-users AT amanda DOT org>
Date: Wed, 7 Aug 2002 16:16:05 -0700
On Wed, Aug 07, 2002 at 06:04:52PM -0400, Joshua Baker-LePain wrote:
> http://amanda.sourceforge.net/fom-serve/cache/27.html

Just a small elaboration on the FAQ:

When using SW compression, you'll know "if you can't afford the extra
CPU usage" by watching "DUMPER STATS" in your Amanda mail report.  If
you're bottlenecked by gzip speed, it shows up as low numbers in the
KB/s field.

(Believe it or not, there is no SPARC box made in the universe that can
run 'gzip --fast' fast enough to keep up with tar/ufsdump.  An Athlon
XP 1800+ box runs gzip about 2X faster than a US-III 750.)

My next Amanda server will be dual-CPU x86 box.  :-)

-- 
Jay Lessert                               jay_lessert AT accelerant DOT net
Accelerant Networks Inc.                       (voice)1.503.439.3461
Beaverton OR, USA                                (fax)1.503.466.9472