Re: [gentoo-user] Compression tools Compared

[Nick Rout <nick@rout.co.nz>]

On Sat, 2005-08-13 at 00:58 -0400, Jerry McBride wrote:
> Anyone else here subscribe to the LINUX JOURNAL?
> 
> In the September issue there's a neat article titled tha same as the subject 
> line of this message.
> 
> The skinny is, there's some really nice file compressors out there and I never 
> heard of two of them... Anyone else know about LZMA or 7ZA?
> 
> The two mentioned compression tools work pretty much like gzip. You tar up 
> your files, pipe to the compression filter and then on to the target file. 
> Below is a small example of what I've been seeing here at the shack.
> 
> -rw-r--r--  1 root root 12359680 Aug 12 23:57 backup.tar
> -rw-r--r--  1 root root  3536665 Aug 13 00:01 backup.tar.7z
> -rw-r--r--  1 root root  4438465 Aug 13 00:08 backup.tar.bz2
> -rw-r--r--  1 root root  4747637 Aug 13 00:03 backup.tar.gz
> -rw-r--r--  1 root root  2731412 Aug 13 00:10 backup.tar.lzma
> -rw-r--r--  1 root root  5125474 Aug 13 00:16 backup.tar.lzop
> 
> What you're seeing are the results of compressing /lib on my gentoo powered 
> laptop. I've not bothered with timing the processes as the better compression 
> rates are at the cost of speed and memory usage. Not good for "while you 
> wait" processing, but just plain perfect for backups and what-have-you on 
> servers... One side note, 7za does not record user/group info... 


Are you saying it removes user/group info from the tar file?


> It's a shame 
> too as this make it pretty much useless in most linux backup scenarios. This 
> lzma creature is simply awesome.
> 
> You can find it at: http://martinus.geekisp.com/rublog.cgi/Projects/LZMA
> 
> Cheers all....
> 
> -- 
> 
> ******************************************************************************
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-- 
Nick Rout <nick@rout.co.nz>

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