公开(公告)号：US09529675B2

公开(公告)日：2016-12-27

申请号：US14331485

申请日：2014-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohui Ma ,  Yaping Sun ,  Haixiao Chen

IPC: G06F11/00 ,  G06F11/10

CPC classification number: G06F11/1088 ,  G06F11/1076 ,  G06F11/1084 ,  G06F2211/1028

Abstract: A data recovery method, a data recovery device and a distributed storage system are provided, where the method includes: in a case that a distributed storage system loses data of three nodes, recovering data on a target data storage node of the data on the three nodes according to data of a parity node and a data storage node without data loss; and performing degraded recovery on the remaining lost data according to the recovered data of the target data storage node. According to the embodiments of the present invention, a target data storage node first recovered is determined according to the symmetry of lost data, and the lost data of three nodes is recovered according to parity data and data that is not lost, which can improve the data recovery performance of the distributed storage system in a case that the data of three nodes is lost.

Abstract translation: 提供了一种数据恢复方法，数据恢复装置和分布式存储系统，其中所述方法包括：在分布式存储系统丢失三个节点的数据的情况下，在三个数据的目标数据存储节点上恢复数据 节点根据奇偶校验节点的数据和没有数据丢失的数据存储节点; 并根据目标数据存储节点的恢复数据，对剩余的丢失数据进行退化恢复。 根据本发明的实施例，根据丢失数据的对称性确定首先恢复的目标数据存储节点，并且根据奇偶校验数据和不丢失的数据恢复三个节点的丢失数据，这可以改善 在三个节点的数据丢失的情况下，分布式存储系统的数据恢复性能。

公开(公告)号：US20150033070A1

公开(公告)日：2015-01-29

申请号：US14331485

申请日：2014-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Xiaohui Ma ,  Yaping Sun ,  Haixiao Chen

IPC: G06F11/10

CPC classification number: G06F11/1088 ,  G06F11/1076 ,  G06F11/1084 ,  G06F2211/1028

Abstract: A data recovery method, a data recovery device and a distributed storage system are provided, where the method includes: in a case that a distributed storage system loses data of three nodes, recovering data on a target data storage node of the data on the three nodes according to data of a parity node and a data storage node without data loss; and performing degraded recovery on the remaining lost data according to the recovered data of the target data storage node. According to the embodiments of the present invention, a target data storage node first recovered is determined according to the symmetry of lost data, and the lost data of three nodes is recovered according to parity data and data that is not lost, which can improve the data recovery performance of the distributed storage system in a case that the data of three nodes is lost.

Abstract translation: 提供了一种数据恢复方法，数据恢复装置和分布式存储系统，其中所述方法包括：在分布式存储系统丢失三个节点的数据的情况下，在三个数据的目标数据存储节点上恢复数据 节点根据奇偶校验节点的数据和没有数据丢失的数据存储节点; 并根据目标数据存储节点的恢复数据，对剩余的丢失数据进行退化恢复。 根据本发明的实施例，根据丢失数据的对称性确定首先恢复的目标数据存储节点，并且根据奇偶校验数据和不丢失的数据恢复三个节点的丢失数据，这可以改善 在三个节点的数据丢失的情况下，分布式存储系统的数据恢复性能。