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Re: e2dis: a Jigdo-like tool for Ext2+ FS images

On Sun, Aug 14, 2011 at 03:07:24PM +0700, Ivan Shmakov wrote:
> 	BTW, I've just announced [1] the availability of the code which
> 	(given some attention and care) may be turned into a Jigdo-like
> 	suite for Ext2+ FS images.
> 	(The casuality of fragmentation on such filesystems greatly
> 	reduces the applicability of the FS-agnostic Jigdo tool.)
> 	Perhaps, this may lessen the burden of the distribution of
> 	Debian virtualization images.  (Should it become a part of the
> 	current practice.)
> 	Alternatively, this tool may allow for “smarter” virtualization
> 	images' backups.  Or, it may be used to save the bandwidth when
> 	sending a whole virtualization image, e. g., to demonstrate a
> 	hard to reproduce bug.
> [1] http://thread.gmane.org/gmane.comp.file-systems.ext4/27269

It seems to me that if you instead physically reordered blocks, actual data
extents could be made contiguous, allowing use of standard Jigdo.

(Of course, that might be not worth the extra effort...)

1KB		// Yo momma uses IPv4!

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