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Title:
DATA PREFETCHING METHOD AND APPARATUS, AND STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/127487
Kind Code:
A1
Abstract:
The present application provides a data prefetching method and apparatus. The data prefetching method is applied to a storage device: after a first data access request is executed, obtaining a first sequence flow length and a first access frequency of a target logic block, a cache of the storage device comprising a plurality of logic blocks, and the target logic block and adjacent logic blocks being comprised in the plurality of logic blocks; after a second data access request is received, modifying the first sequence flow length into a second sequence flow length, and modifying the first access frequency into a second access frequency, the second data access request being used for accessing the target logic block; and calculating the sequence degree of the target logic block according to the second sequence flow length and the second access frequency, and executing a data prefetching operation when the sequence degree of the target logic block exceeds a first prefetching threshold. A parallel sequential flow can be accurately recognized to trigger the data prefetching operation, and the data hit rate is improved.

Inventors:
TAN CHUNHUA (CN)
JIA WEIQIANG (CN)
LI DING (CN)
YANG WENQIANG (CN)
WANG LIYU (CN)
JI PENGLI (CN)
Application Number:
PCT/CN2017/120200
Publication Date:
July 04, 2019
Filing Date:
December 29, 2017
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G06F12/08
Foreign References:
CN107273053A2017-10-20
CN103635887A2014-03-12
CN104063330A2014-09-24
CN101266578A2008-09-17
CN102111448A2011-06-29
US20040003178A12004-01-01
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