On Tue April 8 2003 08:55, Toralf Lund wrote:
>A question a bit on the side:
>
>I've been looking for a new drive or autoloader, and I notice that
> some vendors now assume a hardware compression ratio of 2.6:1 in
> their advertising material. Which leads me to the question in the
> subject; has anyone ever compressed real data that much? Or even
> achieved a ratio of 2:1, which is also frequently assumed? (In
> conjunction with backups, that is.) The best I've done with
> Amanda is about 1.8:1, but that's for software compression, of
> course.

You should be able, for those files that are compressable, get a 
higher compression ratio than that.  With half my system here not 
being compressed at all, I still manage to get 2.5/1 overall on an 
average nights run.  Humm, maybe I should note that recently I 
haven't made that ratio, having grabbed all of debian (7 cd's) 
recently & that extra 3.5 gigs of nearly uncompressable stuff plays 
up the average & the system is still settling down.

I turn compression on and off in the disklist entry, and IIRC I have 
one DLE that I need to turn it off for, I was testing someones 
statement about it and forgot I'd left it on.

-- 
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz  512M
99.25% setiathome rank, not too shabby for a WV hillbilly
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Copyright 2003 by Maurice Eugene Heskett, all rights reserved.