Dynamic DASD data management and partitioning based on access frequency utilization and capacity

An apparatus for managing data on DASD units to improve system performance comprising:

• a memory;
• a program resident in memory and configured to characterize frequently accessed data portions of a DASD unit as HOT data and less frequently accessed data portions of the DASD unit as COLD data, the program further configured to assign utilization factors to the DASD units which are reflective of the number of times each DASD unit is accessed during a time period and to move HOT and COLD data between DASD units based on the utilization factors of the DASD units.

An apparatus for managing data on DASD units to improve system performance comprising:

• a memory;
• a program resident in memory and configured to characterize frequently accessed data portions of a DASD unit as HOT data and less frequently accessed data portions of the DASD unit as COLD data, the program further configured to partition the DASD unit to have a HOT partition and a COLD partition and, on the DASD unit, to move HOT data to a HOT partition and COLD data to a COLD partition.

A program product for managing data on DASD units to improve system performance, the program product comprising:

• a program configured to characterize frequently accessed data portions of a DASD unit as HOT data and less frequently accessed data portions of the DASD unit as COLD data, the program further configured to assign utilization factors to the DASD units which are reflective of the number of times each DASD unit is accessed during a time period and to move HOT and COLD data between DASD units based on the utilization factors of the DASD units;
• a signal bearing media bearing the program.

A program product for managing data on DASD units to improve system performance, the program product comprising:

• a program configured to characterize frequently accessed data portions of a DASD unit as HOT data and less frequently accessed data portions of the DASD unit as COLD data, the program further configured to partition the DASD unit to have a HOT partition and a COLD partition and, on the DASD unit, to move HOT data to a HOT partition and COLD data to a COLD partition;
• a signal bearing media bearing the program.