Favored cache status for selected volumes within a storage system

A computer program product for improving cache hit ratios for selected volumes within a storage system, the computer program product comprising a non-transitory computer-readable storage medium having computer-usable program code embodied therein, the computer-usable program code configured to perform the following when executed by at least one processor:

• monitor I/O to a plurality of volumes residing on a storage system, the storage system comprising a cache;
• determine, from the I/O, which particular volumes of the plurality of volumes would benefit the most if provided favored status in the cache, the favored status providing increased residency time in the cache compared to volumes not having the favored status;
• generate, by a host system, a list of the particular volumes that have the favored status in the cache and transmitting the list from the host system to the storage system;
• and
• provide, by the storage system, increased residency time to the particular volumes in the list in accordance with their favored status.

A system for improving cache hit ratios for selected volumes within a storage system, the system comprising:

• at least one processor;
• at least one memory device operably coupled to the at least one processor and storing instructions for execution on the at least one processor, the instructions causing the at least one processor to:
• monitor I/O to a plurality of volumes residing on a storage system, the storage system comprising a cache;
• determine, from the I/O, which particular volumes of the plurality of volumes would benefit the most if provided favored status in the cache, the favored status providing increased residency time in the cache compared to volumes not having the favored status;
• generate, by a host system, a list of the particular volumes that have the favored status in the cache and transmitting the list from the host system to the storage system;
• and
• provide, by the storage system, increased residency time to the particular volumes in the list in accordance with their favored status.