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1. (WO2017157145) DATA PRE-FETCHING METHOD AND DEVICE

Pub. No.:    WO/2017/157145    International Application No.:    PCT/CN2017/074388
Publication Date: Fri Sep 22 01:59:59 CEST 2017 International Filing Date: Thu Feb 23 00:59:59 CET 2017
IPC: G06F 12/08
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: XU, Xiaoxin
徐晓忻
CHEN, Ligang
陈立钢
LIAO, Yixiang
廖义祥
Title: DATA PRE-FETCHING METHOD AND DEVICE
Abstract:
A data pre-fetching method and a pre-fetching device for boosting service performance of a system. The data pre-fetching method comprises: a first pre-fetching device receiving a data pre-fetching instruction from a first host; determining, according to the data pre-fetching instruction, one or more target data blocks; if the first pre-fetching device does not have the target data block stored therein, acquiring identifier information of a target data block from a second pre-fetching device; determining, according to the identifier information of the target data block, a target storage location of the target data block; pre-fetching the target data block from the target storage location and moving the same to a local location of the first pre-fetching device. By using the method, initialized, mirrored data originally stored in the cache of the host is stored in a pre-fetching device separate from the host, thus reducing the amount of data reading and writing and bandwidth occupancy, speeding up host service processes, and enhancing service performance of the host.