The patch system I worked with generated signatures of each build. The signature had the hash of each block of the build. The client has the signature for their version (1.0) and they download the signature of the new version (1.2) and diff the two. Then they download each block that has changed.
I think it was the `electron-updater` for my electron app, but I don't quite remember now.
It was just a couple years ago that I learned that the Unix compression libraries have a flag to make them “rsync friendly”. They do something with compression blocks to make them more stable across changes. Normally a small change in the middle of a file could change the rest of the output, due to bit packing.
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The patch system I worked with generated signatures of each build. The signature had the hash of each block of the build. The client has the signature for their version (1.0) and they download the signature of the new version (1.2) and diff the two. Then they download each block that has changed.
I think it was the `electron-updater` for my electron app, but I don't quite remember now.
It was just a couple years ago that I learned that the Unix compression libraries have a flag to make them “rsync friendly”. They do something with compression blocks to make them more stable across changes. Normally a small change in the middle of a file could change the rest of the output, due to bit packing.
I should really figure out how that works.