The user issues IXLCACHE REQUEST=WRITE_DATA to write a new and changed data item and assigns it to storage class 1.

Environment

Environment at the time of the user action:

• No free storage available in cache structure.
• There is enough reclaimable storage in each of the three storage classes to satisfy the request.

System Response

The system reclaims storage from storage class 1 and allocates it to the new data item. It subtracts 1 from the reclaim counter for storage class 1 in the vector.

Vector Counts after the Request

The system can perform subsequent storage reclaims for data items assigned to storage class 1 as follows:

• From storage class 1: 1 reclaim (changed after this request)
• From storage class 2: 0 reclaims
• From storage class 3: 1 reclaim