Storage reclamation on tape management systems
AssigneeInternational Business Machines Corporation
InventorNils Haustein
Life of this patent
Estimating the term…
Abstract
A method for managing storage reclamation on a tape management system is provided. The method allows the calculation of the optimum reclamation threshold value for a given system, thereby increasing the performance of the system drastically.
Claims12
A method for managing storage reclamation on a tape management system having a plurality of tape devices, a number of scratch tapes, and a number of private tapes, said method comprising the steps of:
- a) receiving the active data distribution on all tapes from the tape management system;
- b) calculating the center of gravity for the active data distribution;
- c) obtaining the number of scratch and private tapes from the tape management system;
- d) calculating the ratio of scratch tapes to private tapes;
- and
- e) calculating a reclamation threshold as a function of the values provided in steps a) to d).
A storage reclamation management system on a tape management system having a number of scratch tapes and a number of private tapes, the system comprising:
- a) a plurality of tape devices;
- b) means for providing the active data distribution on all tapes present in the tape management system;
- c) means for obtaining the number of scratch and private tapes from the tape management system;
- d) means for calculating the center of gravity for said active data distribution;
- e) means for calculating the ratio of scratch tapes to private tapes;
- and
- f) means for calculating a reclamation threshold as a function of the values provided in steps b) to e).
A computer program product stored on a computer usable medium, comprising computer readable instructions for:
- a) receiving the active data distribution on all tapes from the tape management system;
- b) calculating the center of gravity for the active data distribution;
- c) obtaining the number of scratch and private tapes from the tape management system;
- d) calculating the ratio of scratch tapes to private tapes;
- and
- e) calculating a reclamation threshold as a function of the values provided in steps a) to d).
Dependencies are inferred from the claim text.