System for modifying JCL parameters to optimize data storage allocations

A system for modifying parameters in job control language (JCL) control blocks to optimize data storage allocations for datasets comprising:

• data collection means for collecting historical data concerning actual data storage space requirements of each dataset;
• parsing means for parsing JCL control blocks for references to datasets and requested data storage space allocations;
• control tables containing a set of rules for substitution of parameters for data storage space allocation requests in JCL control blocks;
• and
• means for generating revised parameters in said JCL control blocks containing revised data storage space allocation requests for said datasets based on said historical data and said rules in said control tables.

A system for modifying parameters in job control language (JCL) control blocks to optimize data storage allocations for datasets comprising:

• data collection means for collecting historical data concerning actual data storage space requirements for each dataset from system management facility (SMF) records maintained by the computer operating system;
• means for generating a class table assigning each dataset to one of a set of classes based on said historical data;
• parsing means for parsing JCL control blocks for references to datasets and requested data storage space allocations;
• and
• means for generating revised parameters in said JCL control blocks for said dataset based on said class for said dataset.