Patent ID: 9165022
Filing Date: 2015-10-20
Classification: G06F

Abstract:
1. A method, comprising: maintaining, via a processor, a single master catalog having a catalog alias and a plurality of user catalogs, wherein each user catalog of the plurality of user catalogs includes data sets and attributes of the data sets; storing, in a group table that is smaller in size than the plurality of user catalogs, data set names and corresponding indexes to the plurality of user catalogs, and pointing via the group table, the catalog alias of the single master catalog to the plurality of user catalogs, wherein the group table is stored in a cache; receiving, via the processor, an indication that a new data set is to be defined; determining, via the processor, a selected user catalog from the plurality of user catalogs, wherein the selected user catalog has a greater amount of available space in comparison to other user catalogs and there is a lesser amount of contention among a plurality of threads or processes to access the selected user catalog in comparison to the other user catalogs, and wherein the selected user catalog is used to store the new data set and attributes of the new data set; subsequent to determining the selected user catalog, inserting via the processor, in the group table, an entry that indicates a data set name corresponding to the new data set and an index to the selected catalog; directing, by the catalog alias of the single master catalog, requests for any data sets to the group table; and moving the new data set to another user catalog, in response to an error caused by the selected user catalog.