Re: Addition of lzma/xz compression to HEAD

Thanks, this is very useful.

Fabien

Le 11 mai 2010 à 21:31, Alexey Shuvaev a écrit :

> Hello!
> 
> Just FYI: noticed addition of lzma directory to BSD.include.dist mtree file.
> Well, now it seems to work!
> 
> /* Test file size 264 MiB */
> 	[wep4035] ~> ll /usr/local/tinderbox/jails/9-amd64/9-amd64.tar 
> 	-rw-r--r--  1 root  wheel  277209600 Apr 20 20:58 /usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 
> /* Cache file in memory */
> 	[wep4035] ~> cat /usr/local/tinderbox/jails/9-amd64/9-amd64.tar > /dev/null
> 
> /* 30 seconds to gzip it */
> 	[wep4035] ~> time tar -cvzf 9-amd64.tar.tar.gz /usr/local/tinderbox/jails/9-amd64/9-amd64.tar 
> 	tar: Removing leading '/' from member names
> 	a usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	30.043u 0.541s 0:15.32 199.6%   37+2093k 0+747io 0pf+0w
> 
> /* 64 seconds to bzip2 it */
> 	[wep4035] ~> time tar -cvjf 9-amd64.tar.tar.bz2 /usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	tar: Removing leading '/' from member names
> 	a usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	63.454u 0.686s 0:32.09 199.8%   37+2108k 0+650io 1pf+0w
> 
> /* And 140 seconds to xz it */
> 	[wep4035] ~> time tar -cvJf 9-amd64.tar.tar.xz /usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	tar: Removing leading '/' from member names
> 	a usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	277.625u 0.857s 2:19.26 199.9%  37+2092k 0+432io 0pf+0w
> 
> /* Resulting sizes :)))) */
> 	[wep4035] ~> ll 9-amd64.tar.tar.*
> 	-rw-r--r--  1 lexx  lexx  84830128 May 11 21:07 9-amd64.tar.tar.bz2
> 	-rw-r--r--  1 lexx  lexx  97667581 May 11 21:07 9-amd64.tar.tar.gz
> 	-rw-r--r--  1 lexx  lexx  56366908 May 11 21:10 9-amd64.tar.tar.xz
> 
> /* 3.5 seconds to gunzip the file (mostly IO-limited) */
> 	[wep4035] ~> cat 9-amd64.tar.tar.gz > /dev/null 
> 	[wep4035] ~> time tar -xvf 9-amd64.tar.tar.gz 
> 	x usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	2.721u 0.747s 0:03.54 97.7%     42+2365k 3+2116io 0pf+0w
> 	[wep4035] ~> rm -R usr/
> 
> /* 18 seconds to bunzip2 it */
> 	[wep4035] ~> cat 9-amd64.tar.tar.bz2 > /dev/null
> 	[wep4035] ~> time tar -xvf 9-amd64.tar.tar.bz2 
> 	x usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	18.136u 0.999s 0:09.59 199.3%   37+2110k 1+2116io 0pf+0w
> 	[wep4035] ~> rm -R usr/
> 
> /* And only 10 seconds to xzdec it */
> 	[wep4035] ~> cat 9-amd64.tar.tar.xz > /dev/null
> 	[wep4035] ~> time tar -xvf 9-amd64.tar.tar.xz
> 	x usr/local/tinderbox/jails/9-amd64/9-amd64.tar
> 	10.304u 0.771s 0:05.59 198.0%   38+2164k 3+2116io 0pf+0w
> 	[wep4035] ~> rm -R usr/
> 
> 
> Thanks to all involved in bringing it to HEAD!
> 
> Alexey.
> 
> P.S. I'm not claiming any statistical validity of provided timings nor
> that the testing procedure is correct. It is just to show that tar in HEAD
> now works with lzma/xz compression.
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