-
公开(公告)号:US10216446B2
公开(公告)日:2019-02-26
申请号:US15960546
申请日:2018-04-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor: Wenhai Lan , Wei Zhang , Xiaoan Yu , Xuyou Liu , Zhixiong Zhang
IPC: G06F3/06 , G06F12/1009 , G06F11/14 , G06F17/30
Abstract: A solution to deduplication in a storage system is disclosed herein. In this solution, a controller stores, at a first storage address, a data block that is written for the first time, and inserts, in a fingerprint table, a first fingerprint of first data that is written for the first time, but does not establish a mapping relationship between the first fingerprint and the first storage address. When receiving subsequently written second data to be written, the controller allocates a second storage address to the duplicate second data, stores the second data at the second storage address, and establishes a mapping relationship between the first fingerprint and the second storage address in the fingerprint table. This reduces an amount of data in the fingerprint table.