Hi again. If someone is interested in the results of my tests and benchmarks, I've uploaded the initial version of my article on the topic in our dev-space.
http://dev.gentoo.org/~mgorny/tmp/squashfs-deltas.pdf I am terribly busy with the uni right now so it will take some time before I continue working on it. I will try to provide a final specification for the first attempt at the idea and ask infra if they are ready to sacrifice the hardware for it. Further possible improvements: 1. switch to LZ4 (stronger compression, even faster) -- will require a newer kernel (3.14?), 2. dedicated SquashFS delta tool -- I'm working on it but the format seems to be poorly documented so it will take some time :). -- Best regards, Michał Górny
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