Data storage apparatus and method allocating sets of data

Details Data storage apparatus and method allocating sets of data Data storage apparatus and method allocating sets of data

1997-04-07

1999-08-24

Cabeca, John W.

Electrical computers and digital processing systems: memory

Storage accessing and control

Memory configuring

711172, 707205, G06F 1200

Patent

active

059436905

ABSTRACT:
A data storage apparatus has a plurality of storage spaces p for storing sets of data. Each of the spaces has: available (unused) space x.sub.1 for storage; a number x.sub.2 of data sets already stored; a number x.sub.3 of channels available for transferring data to the space; and a number x.sub.4 of times the space is scheduled to be used for reading out sets of data therefrom. An allocation factor Qp=f(ai, xi) is calculated for each space where ai are weighting factors ranking xi in order of importance. A data set is allocated to the space having the "best " (e.g. lowest) value of Qp at the time the data is to be allocated. Once allocation factors determined, then data may be allocated according to usage indices representing the ability of a space to store the data at the time of allocation.

REFERENCES:
patent: 4638424 (1987-01-01), Beglin et al.
patent: 5345584 (1994-09-01), Hill
patent: 5506986 (1996-04-01), Healy
patent: 5675726 (1997-10-01), Hohenstein et al.
patent: 5732402 (1998-03-01), Lehman

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