4 ms·

Not if you consider speed and CPU consumption.

• rikkus 8y ago
  And it getting out of sync with reality. Metadata on the files seems much better.
• jorangreef 8y ago
  Yes, on file hashes for rename detection: It prevents a whole lot of pipeline and concurrency optimizations since it forces you to rehash every file in the change set, before your rename detection algorithm can kick in. For example, if a user renames a root folder with tens of thousands of descendants, then the hash approach would have poor time-to-first-change-synced latency. Furthermore, relying on file hashes won't actually work. A user could have done both a RENAME and UPDATE on the file, since the sync app last ran (you need scanning logic for this, and can't rely solely on inotify). To survive a RENAME and UPDATE, you would then need to compare partial file hashes. But again, it affects latency too much.