Data processing: database and file management or data structures – Database design – Data structure types
Patent
1996-09-19
1998-07-07
Black, Thomas G.
Data processing: database and file management or data structures
Database design
Data structure types
39518204, 711117, G06F 1730
Patent
active
057783918
ABSTRACT:
A method and system for reclaiming stacked volumes within a peripheral data storage subsystem is disclosed. In accordance with the method and system of the present invention, a database is interrogated to determine whether or not an opportunistic reclaim threshold of a stacked volume has been reached after a service request from a host computer has been performed on a stacked volume and while the stacked volume is still mounted. If the opportunistic reclaim threshold of the stacked volume has not been reached, the stacked volume is released and dismounted. However, if the reclaim threshold of the stacked volume has been reached, another determination is made as to whether or not a service request for the host computer is pending. If the host computer requires service, the stacked volume is again released and dismounted. Otherwise, if the host computer does not require service, at least one data set from the mounted stacked volume is opportunistically reclaimed while the stacked volume is still mounted.
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Fisher James Arthur
Gallo Frank David
Kishi Gregory Tad
Black Thomas G.
Dillon Andrew J.
International Business Machines - Corporation
Ng Antony P.
Rones Charles L.
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