If you didn't need persistence, I would point you at IPC:MM, which has unbeatable performance. Since you do need persistence, the best choice is a dbm-based one. You can use either BerkleyDB, which has its own locking system, or MLDBM::Sync which works with all the popular dbms. These are faster than SQLite.

Of course you can also use MySQL for this and get performance that's good enough for most things.

In reply to Re: Concurrent access to temporary and persistant storage by perrin
in thread Concurrent access to temporary and persistant storage by hacker

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