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PostgreSQL's Multi-Version Concurrency Control

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System Level Concurrency Control for Distributed Database Systems / S.J. Rosenkrantz, R.E. Stearns, and P.M. Lewis - ACCÈS PAYANT

Apache HBase Internals: Locking and Multiversion Concurrency Control - Cloudera Engineering Blog

Structured Concurrency Control in Object-Oriented Databases

http://qatestlab.com/ A software testing company distinguishes 3 patterns of handling software concurrency issues. They are: pessimistic pattern of concurrency control, optimistic pattern of concurrency control and pattern with no control of concurrency issues.

Recommended by Dr. Dobbs and top rated on Amazon.com. The book approaches the topic from a design pattern point of view. It introduces and summarizes Java's concurrency support, shows readers how to initiate, control, and coordinate concurrent activities, and offers numerous recipe-like techniques for designing and implementing Java structures that solve common concurrent programming challenges.

Checkout a session: (Click to enlarge) Checkout a session: The next step is to checkout a session. Access control rules determine which users are allowed to checkout a session to which accounts on which systems. Alternately, a user can request one-time access (authorized through a workflow process). In either case, concurrency limits may be in place, for example to ensure that no more than two administrators work on the same system at the same time.

Checkout a session: The next step is to checkout a session. Access control rules determine which users are allowed to checkout a session to which accounts on which systems. Alternately, a user can request one-time access. In either case, concurrency limits may be in place, for example to ensure that no more than two administrators work on the same system at the same time. See more at: http://hitachi-id.com/privileged-access-manager/overview/screen-shots.html