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Mastering Optimistic Concurrency Control

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Mastering Optimistic Concurrency Control

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Questions and Answers

What is optimistic concurrency control (OCC)?

Optimistic concurrency control (OCC) is a concurrency control method used in transactional systems, where transactions assume that multiple transactions can frequently complete without interfering with each other and do not acquire locks on data resources while running.

Who proposed optimistic concurrency control (OCC)?

Optimistic concurrency control (OCC) was first proposed by H. T. Kung and John T. Robinson in 1979.

What does optimistic concurrency control (OCC) assume about transactions?

Optimistic concurrency control (OCC) assumes that transactions can frequently complete without interfering with each other, and conflicts are rare in the environment.

What does a transaction do before committing in optimistic concurrency control (OCC)?

<p>Before committing, a transaction in optimistic concurrency control (OCC) verifies that no other transaction has modified the data it has read.</p> Signup and view all the answers

In what type of environments is optimistic concurrency control (OCC) generally used?

<p>Optimistic concurrency control (OCC) is generally used in environments with low data contention, where conflicts between transactions are rare.</p> Signup and view all the answers