Ivan Shmakov wrote:
>
>       Jigdo has to “discover” octet sequences on an image with
>       hashing, which is computationally expensive.

Yes.

>       IIRC, Debian's genisoimage(1) was altered to prepare a Jigdo's
>       .template file as part of the image generation, which is much
>       more efficient.  I believe that a similar approach could be, and
>       should be, used for the other filesystems as well.

That would be absolutely the best way to go, yes. I added the code
into mkisofs and genisoimage, but it has since been abstracted out
into libjte, part of the cdrkit package in Debian.

-- 
Steve McIntyre, Cambridge, UK.                                st...@einval.com
"...In the UNIX world, people tend to interpret `non-technical user'
 as meaning someone who's only ever written one device driver." -- Daniel Pead


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