Non-lock concurrency control

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In Computer Science, in the field of databases, non-lock concurrency control is a concurrency control method used in relational databases without using locking.

There are several non-lock concurrency control methods, which involve the use of timestamps on transaction to determine transaction priority:

• Optimistic concurrency control
• Timestamp-based concurrency control{{Cite book |last= |first= |url=https://www.google.co.uk/books/edition/Introduction_to_Database_Systems/y7P9sa2MeGIC?hl=en&gbpv=1&dq=%22Non-lock+concurrency+control%22+-wikipedia&pg=PA330&printsec=frontcover |title=Introduction to Database Systems |date=September 2010 |publisher=Pearson Education India |isbn=978-81-317-3192-5 |page=341 |language=en}}
• Validation-based concurrency control
• Multiversion concurrency control
• Snapshot isolation