How does IMS handle deadlock situations in a database environment?

In an IMS (Information Management System) database environment, deadlock situations occur when multiple transactions are waiting for each other to release resources, leading to a standstill in the system. IMS employs various techniques to handle deadlock situations:

• Timeout Mechanism: IMS sets a timeout for transactions, and if a transaction has been waiting for a resource for a specified period, IMS forces it to terminate to break the deadlock.
• Transaction Rollback: IMS can rollback transactions to a previous checkpoint to release resources and break deadlocks.
• Resource Requeuing: IMS can requeue resources in a deadlock situation to allow transactions to proceed without deadlock.
• Deadlock Detection and Resolution: IMS continuously monitors the system for deadlock situations and employs algorithms to detect and resolve deadlocks efficiently.

By implementing these strategies, IMS ensures smooth operations and minimizes downtime in a database environment when deadlock situations occur.