What are the different types of concurrency control techniques?

What are the different types of concurrency control techniques?

Concurrency control techniques are methods used in databases to manage simultaneous operations without conflicting. The main types include: 1. Pessimistic Concurrency Control 2. Optimistic Concurrency Control 3. Timestamp-based Concurrency Control 4. Multi-Version Concurrency Control (MVCC). Would you like to know more about any specific type?

Can you explain Pessimistic Concurrency Control?

Sure! Pessimistic Concurrency Control assumes that conflicts will occur, so it locks resources when they are accessed. This prevents other transactions from accessing the same resources until the lock is released, ensuring data integrity.

What about Optimistic Concurrency Control?

Optimistic Concurrency Control, on the other hand, assumes that conflicts are rare. It allows transactions to execute without locking resources but checks for conflicts before committing. If a conflict is detected, the transaction is rolled back.

Which technique is more efficient?

The efficiency depends on the application. Pessimistic control can be more efficient in high-conflict environments, while optimistic control is better for low-conflict scenarios. It’s essential to analyze the specific use case.