Allocate Records in Cache
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Before the cache can be used to store records, the defective areas of the cache must be found and the required structures to process these records must be allowed in defect-free areas of the cache. This work is performed in two steps. The first step is done during Initial Microprogram Load (IML) based on the size of the cache. The second step is performed based on data supplied by the customer. Defect-free bytes of system storage are allocated to the other Directory Area. This is required because errors detected accessing critical areas of the subsystem storage indicate potential data integrity problems. The record slots are then allocated using weights specified by the host. The number of slots of the first size specified by the first weight will be allocated.