Non-lock concurrency control

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

(+++Applicable to all database types, not just relational +++)

There are several non-lock concurrency control methods:

• Optimistic concurrency control
• Timestamp-based concurrency control
• Multiversion concurrency control

They involve the use of timestamps on transaction to determine transaction priority.

(+++Not all these methods necessariliy use timestamps+++ Article looks redundant. +++)

(+++Validity of a separate article for this subject is questionable, since each method is unique, and not much in common. Why not an article on "non timestamp CC?" +++)

See also

• Concurrency pattern
• Optimistic concurrency control (should Optimistic concurrency control and Non-lock concurrency control be merged ? No. Non-lock does not imply optimistic, and vice-versa. See definition of optimistic)
• InterBase
• Lock-free and wait-free algorithms