System and method for determining sequential cache data access i

Details System and method for determining sequential cache data access i System and method for determining sequential cache data access i

1994-12-12

1997-10-28

Kim, Matthew M.

395463, G06F 1208

Patent

active

056825005

ABSTRACT:
A dynamic 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 along with a time indication which relates to each data elements use in the cache. A sequential data access indicator, responsive to the cache index, to the time indication associated with each data element and to a user selectable 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.

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