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When I have a large set of files, I find compressing them
with 7-zip with a larger "solid block size" is much more
efficient than compressing them individually. This works
because it takes advantage of patterns that exist across
the whole set of files (particularly with backups of multiple
Think of how many copies of Windows are installed out
there. Online backup services might be storing many,
many copies of the same stuff.
Proposed is a cloud backup/file storage service in which all
users' files are treated as a solid block.
The only caveat I can imagine is that the entire block
would have to be deduplicated on each write. I suppose
they could be committed to disk and compressed later.
||Or you could just pay a subscription fee per program installed and add your name to a roster of approved users.
||It's not just programs that are deduplicated, though.
With sufficient computing resources, you could
deduplicate the recipe collections of two old ladies
or of an entire family's photo album (since it's likely
they have shared pictures).