System for dynamically controlling cache manager maintaining cac

Details System for dynamically controlling cache manager maintaining cac System for dynamically controlling cache manager maintaining cac

1994-12-12

1996-07-16

Kim, Matthew M.

Boots, shoes, and leggings

395463, 39549701, 395457, 364DIG1, 36424341, 36424812, 364251, G06F 1208

Patent

active

055375685

ABSTRACT:
A cache management system and method monitors and controls the contents of cache memory coupled to at least one host and at least one data storage device. A cache indexer maintains a current index of data elements which are stored in cache memory. A sequential data access indicator, responsive to the cache index and to a user selectable sequential data access threshold, determines that a sequential data access is in progress for a given process and provides an indication of the same. The system and method allocate a micro-cache memory to any process performing a sequential data access. In response to the indication of a sequential data access in progress and to a user selectable maximum number of data elements to be prefetched, a data retrieval requestor requests retrieval of up to the selected maximum number of data elements from a data storage device. A user selectable number of sequential data elements determines when previously used micro-cache memory locations will be overwritten. A method of dynamically monitoring and adjusting cache management parameters is also presented.

REFERENCES:
patent: 4533995 (1985-08-01), Christian et al.
patent: 4807110 (1989-02-01), Pomerene et al.
patent: 5134563 (1992-07-01), Tayler et al.
patent: 5226141 (1993-07-01), Esbensen
patent: 5381539 (1995-01-01), Yanai et al.

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