Somehow, I feel the difference among sync, cloud storage, backup is always confusing. Here is some notes, which I think I can use to differentiate them.
- sync(machine A <-> machine B)
- keep environment consistent.
- backup(machine A -> machine B/cloud storage)
- backup must have versions of files, or it is meaningless. In addition, backup tools should provide encryption, compression, which are not necessary in sync.
- cloud storage
- providers or machines
- self-hosted cloud storage is purely a machine. This is to say any machine in the above difinitions could be a cloud storage machine.
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