Multiple window based segment prefetching
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United States of America Patent
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Jul 4, 2017
Grant Date -
Dec 29, 2016
app pub date -
Jun 29, 2015
filing date -
Jun 29, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A method, a computer program product, and a computer system for implementing multiple window based segment prefetch used for data pages that are out of sequence. A computer initiates a buffer for the segment prefetch. The computer builds up windows in the buffer, each of the windows comprising data pages among which neighboring data pages are within a predetermined distance therebetween. The computer determines whether a respective one of the windows exceeds a predetermined window size. The computer triggers the segment prefetch, in response to determining that the respective one of the windows exceeds the predetermined window size. The computer uses an asynchronous I/O to get the data pages in the respective one of the windows.
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