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Hello all,

   I have a somewhat large file (4.6GB), which is a disk image. I would
like to transfer it via the Internet to a remote location for backup
purposes. However, due to the nature of the disk image, it is very
wasteful to send all of it each time I want to make a backup.

   Before anyone suggests unison: Yes, I have tried it, but since I only
have 2GB physical RAM in this system, I would prefer not to use it,
since it makes my system slow to a crawl and swap like mad.

   I decided to write a tool which calculates md5 sums on a block basis.
What I want to do next is simply run the script on both computers to
generate md5 files. Then check which blocks differ, transmit them, and
store them in the proper places within the backup-image.

   Now I'm realizing that it's more work than I want to put into it,
unless I really have to. :-)

   Is there a tool which can "synchronize" two files over an ssh tunnel
(except unison, that is)?

   (I want to point out that I use unison for other purposes, and I am
very happy with it.. It just sucks when it comes to really large files).

--=20
Kind regards,
Jan Danielsson



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