Method for managing a data cache using virtual external storage

Details Method for managing a data cache using virtual external storage Method for managing a data cache using virtual external storage

1990-02-09

1992-02-11

Olms, Douglas W.

Boots, shoes, and leggings

364DIG1, G06F 100

Patent

active

050880268

ABSTRACT:
A method to manage the access of data or pages mapped into a very large virtual external address space through a cache without disturbing the logical view of the data and without having to assign physical or real backing store to said logical view. A data cache is used in which pages are indexed according to a logical address intermediate to their virtual address and their physical location in external storage. Pages common to two or more files are updated in place in the cache, while pages bound to only one file are shadow copied.

REFERENCES:
patent: 3825904 (1974-07-01), Burk et al.
patent: 3902164 (1975-07-01), Kelley et al.
patent: 4376297 (1983-03-01), Anderson et al.
patent: 4603380 (1986-07-01), Easton et al.
patent: 4680700 (1987-06-01), Hester et al.
patent: 4755928 (1988-07-01), Johnson et al.

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