Input/output processing method in a database management system
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United States of America Patent
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Nov 9, 1993
Grant Date -
N/A
app pub date -
Mar 9, 1990
filing date -
Mar 10, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
With respect to input/output requests; a microprogram controls collection of data according to the data format; data accessing divides the requests for every recording medium and performs asynchronous processing; an on-line process is carried out in view of the processing priority order of the requests; parallel accessing sets requests for each medium; buffer control assures a block buffer and a page address list before receiving requests; data accessing sets a list of CCHHR codes in response to a continuous characteristic of the stored state in the recording medium; and mode deciding judges the two data transfer modes, a page search mode and a data search mode, in response to the requests.
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