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Now I'm curious - does Dropbox use rsync under the hood? (not rsync.net, the rsync protocol)
by propelledjeans 13y ago
Now I'm curious - does Dropbox use rsync under the hood? (not rsync.net, the rsync protocol)
- wmf 13y agoAFAIK Dropbox uses an rsync-like compare-by-hash protocol over HTTP.
- saosebastiao 13y agoI don't think they can...rsync is GPLv3.
- polyfemos 13y agosurely that would just apply to the rsync code, not a re-implementation using the same protocol?
- Ygor 13y agoThere are 3 different concepts in play here: - rsync algorithm - rsync protocol - rsync program The algorithm is fairly well described here: http://rsync.samba.org/tech_report/ http://rsync.samba.org/tech_report/ The protocol documentation is non existant (AFAIK), and basically the only standard is the rsync program itself. The protocol is strange, and there are some quirks, so it is not trivial to replicate or write custom clients. This is why it is hard to implement an rsync program that can talk to the standard rsync program, but it is not that hard to implement your own client and server which use a custom protocol that implements an rsync-like algorithm.