Cartridge shifting optimization in a super library

Details Cartridge shifting optimization in a super library Cartridge shifting optimization in a super library

1997-05-28

1998-04-14

Elmore, Reba I.

Boots, shoes, and leggings

414273, G06F 1700, G06G 748

Patent

active

057400610

ABSTRACT:
A system for optimizing the position and use of cartridges of machine-readable data storage media in an automated super library. The invention is implemented in a super library that includes a main library bin with a plurality of cartridge slots, a picker, and multiple small libraries, where each small library has a small library bin with multiple slots, a picker, and at least one data drive. Mount queue times are estimated for each small library, and a main library picker is selectively operated to transfer cartridges between the small libraries based on the estimated mount queue times. This provides expedited access of the cartridges at the small libraries. The host processor maintains requests for such inter-library transfers in a main picker queue, for processing by the main picker. When each small library has a non-empty mount queue, the main picker processes small libraries' cartridge transfer requests by efficiently distributing cartridges along the small libraries. In addition to these demand-based transfer requests, the main picker regularly performs load-leveling between the small libraries and the main library bin, to ensure that the higher demand cartridges are stored in the small library bins rather than the main library bin. The invention also contemplates one or more priority slots in each small library, to store cartridges designated for high priority use.

REFERENCES:
patent: 4771375 (1988-09-01), Belgin et al.
patent: 4864438 (1989-09-01), Munro
patent: 4864511 (1989-09-01), Moy et al.
patent: 5164909 (1992-11-01), Leonhardt et al.
patent: 5239650 (1993-08-01), Hartung et al.
patent: 5276867 (1994-01-01), Kenley et al.
patent: 5336030 (1994-08-01), Ostwald et al.
patent: 5345350 (1994-09-01), Ellis et al.
patent: 5355475 (1994-10-01), Tanaka et al.
patent: 5362192 (1994-11-01), Dang
patent: 5377121 (1994-12-01), Dimitri et al.
patent: 5418971 (1995-05-01), Carlson
patent: 5423018 (1995-06-01), Dang et al.
patent: 5471561 (1995-11-01), Cowgill et al.
patent: 5479581 (1995-12-01), Kleinschnitz
patent: 5500803 (1996-03-01), Munro et al.
patent: 5508859 (1996-04-01), Hu et al.
"Two Means of Improving Access to the Data in a Library Subsystem", IBM Technical Disclosure Bulletin, vol. 33, No. 11, Apr. 1991.
"Automated Cartridge Disposition Promotion (Unload-Least Recently Used to Keep)", IBM Technical Disclosure Bulletin, vol. 36, No. 08, Aug. 1993.

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