Assigning shared catalogs to cache structures in a cluster computing system

A method for assigning a cache structure to a catalog, the method comprising:

• facilitating data sharing among a plurality of host systems of a cluster computing system with a coupling facility comprising a plurality of cache structures for catalogs of the cluster computing system;
• identifying, by use of a processor, a catalog for sharing in association with the coupling facility;
• obtaining one or more usage status indicators for the catalog;
• estimating future catalog usage based on the catalog usage statistics for the one or more usage status indicators;
• selecting a cache structure of the plurality of cache structures for the catalog based on the one or more usage status indicators according to an assignment policy, wherein the usage status indicators comprise an availability schedule and wherein the method further referencing an availability schedule of one or more of a particular host system and a particular catalog, wherein the cache structure for the catalog based is selected at least in part on the availability schedule;
• and
• storing catalog information of the catalog in an isolated, individual Enhanced Catalog Sharing (ECS) cache structure in response to the future catalog usage meeting a threshold, wherein only one volume record resides in the isolated, individual ECS cache structure.

A computer program product for assigning a cache structure to a catalog, the computer program product comprising a computer readable storage medium storing machine readable code executed by a processor to perform the operations of:

• facilitating data sharing among a plurality of host systems of a cluster computing system with a coupling facility comprising a plurality of cache structures for catalogs of the cluster computing system;
• identifying a catalog for sharing in association with the coupling facility;
• obtaining one or more usage status indicators for the catalog;
• estimating future catalog usage based on the catalog usage statistics for the one or more usage status indicators;
• selecting a cache structure of the plurality of cache structures for the catalog based on the one or more usage status indicators according to an assignment policy, wherein the usage status indicators comprise an availability schedule and wherein the processor further references an availability schedule of one or more of a particular host system and a particular catalog, wherein the processor selects the cache structure for the catalog based at least in part on the availability schedule;
• and
• storing catalog information of the catalog in an isolated, individual Enhanced Catalog Sharing (ECS) cache structure in response to the future catalog usage meeting a threshold, wherein only one volume record resides in the isolated, individual ECS cache structure.