Method and apparatus for grouping asynchronous recording operations
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United States of America Patent
Stats
-
Jan 13, 1987
Grant Date -
N/A
app pub date -
Feb 24, 1982
filing date -
Feb 24, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The disclosure relates to demotion of data to a backing store (disk storage apparatus--DASD) from a random access cache in a peripheral data storage system. A cache replacement control list, such as a least recently used (LRU) list is scanned in a soon-to-be replaced first portion (portion closest to LRU entry) to identify first data to be demoted. Then the control list is scanned in first and second portions to identify further data to be demoted with the first data as a single group of data. In DASD, such data is all storable in the same cylinder of the DASD.
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