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I know CouchDB doesn't do read locking. What are other ones out there?


Not doing read locking is not a game-changer.

Firebird doesn't do read locking. Neither does Lotus Notes. Both have been around about 20 years.


Not doing read locking alone. Combine it with a planet-scale data storage system...


Postgres and Oracle?


PostgreSQL uses MVCC to ensure ACID compliance without read locks. Uncommitted concurrent transactions are isolated from each other.


Datomic.




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