High concurrency in use manager
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United States of America Patent
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-
Nov 23, 1993
Issued Date -
N/A
app pub date -
Jun 5, 1992
filing date -
Apr 17, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An in use table manager in a computer system uses an in use table to track the use of files, or objects. The in use table is used to determine which objects may need recovery in the event of a system failure. Object addresses are hashed by the in use manager to identify a preferred slot in the table. The slots contain information identifying the object, and indicating the extent of use of the object. The in use manager assigns alternate slots, and dynamically changes the size of the in use table to reduce contention for slots. Several atomic operations on the table ensure integrity of the table, while permitting concurrent use. Portions of the table are bundled into single I/O operations to enhance system performance by minimizing I/O.
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