3 ms·

so it’s just a lease server but without the strong linearizability guarantee you would get with ETCD and zookeepers?

• skyde 4y ago
  basically if it does not use synchronous replication. and master server switch then 2 client could think they own an unexpired lock. But if it does synchronous replication without using a consensus algorithm like Paxos or Raft then the system become unwrittable if an instance go down.
• keyless_ 4y ago
  Lockable itself isn't distributed (or, at the very least, doesn't appear distributed from the outside), so I'm not sure if linearizability applies here, but maybe I'm misunderstanding you comment. In a similar vein, I guess you can ask what happens if a client first checks if a lock is available then tries to acquire it, in two separate steps; but in that case, there's no guarantee that the lock wasn't acquired in between checking and acquisition.