Messages in this thread |  | | From | "H. Peter Anvin" <> | Subject | Compressed iso9660 filesystem | Date | 4 May 2001 18:10:19 -0700 |
| |
Okay, I think I now feel comfortable enough that I think I can unleash this on the world...
I have made an extension to iso9660/RockRidge to allow for transparent uncompression of block-compressed files. Because the files are block-compressed, random access is fast; it uses a 32K blocksize which gets pretty good compression ratios (I got 2:1 overall compression on my SuperRescue CD; that includes a fair number of incompressible files.)
The patches are available as:
ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/filemap-2.4.4-1.diff.gz ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/zisofs-2.4.5-pre1-5.diff.gz
(Both are needed.)
Additionally, the user-space utilities (a program to compress and uncompress file trees, and a patch to mkisofs to generate the new RockRidge records for compressed files) are available at:
ftp://ftp.kernel.org/pub/linux/kernel/people/hpa/zisofs/
If you test this out, please let me know; I'd like to know if anyone actually cares about this... also, I would like to gauge if I have messed up stability anywhere.
-hpa
-- <hpa@transmeta.com> at work, <hpa@zytor.com> in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |