Extended Buffer Manager for VSAM

The architecture of Extended Buffer Manager for VSAM, while no longer supported, centered on an extended buffer pool designed to cache frequently accessed VSAM records. The main components included the Buffer Manager, the Monitor, and the VSAM Interface. The Buffer Manager handled buffer allocation, deallocation, and management.

The Monitor provided performance statistics, including buffer hit ratios and I/O reduction. The VSAM Interface intercepted VSAM I/O requests and directed them to the buffer pool. Configuration involved JCL statements to define buffer pool sizes, characteristics, and the datasets to be managed.

For example, the `EBMPOOL` parameter specified the pool size, and the `DSN` parameter identified the VSAM datasets. Communication between components was primarily through z/OS system services and VSAM access methods. The product did not use any external databases or storage mechanisms beyond the z/OS environment.

There were no specific network requirements or exposed APIs. The product's functionality is now available in other VSAM management tools, such as IBM DFSMS, which provide similar or enhanced capabilities.