Gentoo Archives: gentoo-user

From: Nick Rout <nick@×××××××.nz>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Compression tools Compared
Date: Sat, 13 Aug 2005 05:41:00
Message-Id: 1123911127.28841.10.camel@sf.rout.dyndns.org
In Reply to: [gentoo-user] Compression tools Compared by Jerry McBride
1 On Sat, 2005-08-13 at 00:58 -0400, Jerry McBride wrote:
2 > Anyone else here subscribe to the LINUX JOURNAL?
3 >
4 > In the September issue there's a neat article titled tha same as the subject
5 > line of this message.
6 >
7 > The skinny is, there's some really nice file compressors out there and I never
8 > heard of two of them... Anyone else know about LZMA or 7ZA?
9 >
10 > The two mentioned compression tools work pretty much like gzip. You tar up
11 > your files, pipe to the compression filter and then on to the target file.
12 > Below is a small example of what I've been seeing here at the shack.
13 >
14 > -rw-r--r-- 1 root root 12359680 Aug 12 23:57 backup.tar
15 > -rw-r--r-- 1 root root 3536665 Aug 13 00:01 backup.tar.7z
16 > -rw-r--r-- 1 root root 4438465 Aug 13 00:08 backup.tar.bz2
17 > -rw-r--r-- 1 root root 4747637 Aug 13 00:03 backup.tar.gz
18 > -rw-r--r-- 1 root root 2731412 Aug 13 00:10 backup.tar.lzma
19 > -rw-r--r-- 1 root root 5125474 Aug 13 00:16 backup.tar.lzop
20 >
21 > What you're seeing are the results of compressing /lib on my gentoo powered
22 > laptop. I've not bothered with timing the processes as the better compression
23 > rates are at the cost of speed and memory usage. Not good for "while you
24 > wait" processing, but just plain perfect for backups and what-have-you on
25 > servers... One side note, 7za does not record user/group info...
26
27
28 Are you saying it removes user/group info from the tar file?
29
30
31 > It's a shame
32 > too as this make it pretty much useless in most linux backup scenarios. This
33 > lzma creature is simply awesome.
34 >
35 > You can find it at: http://martinus.geekisp.com/rublog.cgi/Projects/LZMA
36 >
37 > Cheers all....
38 >
39 > --
40 >
41 > ******************************************************************************
42 > Registered Linux User Number 185956
43 > FSF Associate Member number 2340 since 05/20/2004
44 > Join me in chat at #linux-users on irc.freenode.net
45 > Buy an Xbox for $149.00, run linux on it and Microsoft loses $150.00!
46 > 12:28am up 26 days, 27 min, 1 user, load average: 0.00, 0.00, 0.00
47 --
48 Nick Rout <nick@×××××××.nz>
49
50 --
51 gentoo-user@g.o mailing list

Replies

Subject Author
Re: [gentoo-user] Compression tools Compared Jerry McBride <mcbrides9@×××××××.net>