Management of destage tasks with large number of ranks

摘要

A processor, operable in a computing storage environment, for each rank in a storage management device in the computing storage environment, allocates a lower maximum count, and a higher maximum count, of Task Control Blocks (TCBs) to be implemented for performing a storage operation, and performs the storage operation using up to the lower maximum count of TCBs, yet only allows those TCBs above the lower maximum count to be allocated for performing the storage operation satisfying at least one criterion.

主权项

1. A method for data management by a processor device in a computing storage environment, the method comprising, for each rank in a storage management device of the computing storage environment:
allocating a lower maximum count defined by a predetermined lower maximum count of Task Control Blocks (TCBs) of a rank for performing destage operations, and a higher maximum count, of TCBs to be implemented for performing a storage operation; and performing the storage operation using up to the lower maximum count of TCBs, yet only allowing those TCBs above the lower maximum count to be allocated for performing the storage operation satisfying at least one criterion; and based on an amount of modified data in cache, determining a number of TCBs needed for a particular rank of the storage management device.