Title:
METHOD AND DEVICE FOR READING DATA
Document Type and Number:
WIPO Patent Application WO/2018/113322
Kind Code:
A1
Abstract:
Provided in the embodiments of the present invention are a method and a device for reading data. The method comprises: acquiring a reading instruction from a host, the reading instruction comprising the identifier of a source logical unit number (LUN) and the first starting address and the first data length of to-be-read data, the source LUN corresponding to a redundant view, the redundant view comprising at least one first record entry, the identifier of a target LUN, which redundantly stores at least part of the data of the source LUN, being stored in each first record entry; if it is determined that the data in the storage space corresponding to the source LUN can't be read, determining, according to the first starting address, the first data length and the redundant view, the identifier of the target LUN corresponding to the to-be-read data; and reading, according to the identifier of the target LUN corresponding to the to-be-read data, first redundant data, and feeding the first redundant data back to the host. The present embodiment can improve the utilization of redundant data of a storage system.
Inventors:
LUO ZHEN (CN)
SUN JIFENG (CN)
SUN JIFENG (CN)
Application Number:
PCT/CN2017/097682
Publication Date:
June 28, 2018
Filing Date:
August 16, 2017
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G06F12/00
Foreign References:
| CN106775481A | 2017-05-31 | |||
| CN105808378A | 2016-07-27 | |||
| CN102667738A | 2012-09-12 |
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