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go-deltasync

Pure-Go, cgo-free building blocks for delta synchronization — move and store only the bytes that actually change between two versions of a file.

Documentation GitHub
single static binaryimportable Go packagewire-compatible100% test coverage
zsh
$ go get github.com/go-deltasync/bita@latest
$ go get github.com/go-deltasync/chunk@latest
$ go get github.com/go-deltasync/rdiff@latest
$ go get github.com/go-deltasync/vcdiff@latest
$ go get github.com/go-deltasync/zchunk@latest
$ go get github.com/go-deltasync/zsync2@latest

zsync2

Download only the changed bytes over plain HTTP.

interoperates with zsync
Docs → Source ↗

chunk

Cut a stream where the bytes say, not where a counter does.

interoperates with the chunker inside bita, with a name
Docs → Source ↗

zchunk

Content-defined chunked container + HTTP-Range delta.

interoperates with zchunk (Fedora/DNF)
Docs → Source ↗

bita

Differential file sync over HTTP (.cba archives).

interoperates with oll3/bita
Docs → Source ↗

Each tool is verified byte-for-byte against its reference implementation.