Describe major components of DB2?

DB2 is a huge relational database management system with many components in it. The four major components of DB2 are:

• System services component: It supports system operations, other communication, logging, and similar functions. It handles startup and shutdowns.
• Locking services component: It provides the necessary controls for managing concurrent access to data. This component is known as Internal Resource Lock Manager (IRLM) and it manages the concurrency issues and deadlocks.
• Database services component: It supports the definition, retrieval, and update of user and system data. It is responsible for the execution of SQL statements and it also manages the buffer pool.
• Distributed data facility component: It provides DB2s, and distributed database support.