公开(公告)号：US12045133B2

公开(公告)日：2024-07-23

申请号：US17940312

申请日：2022-09-08

Applicant: Hitachi, Ltd.

Inventor： Takahiro Yamamoto ,  Hideo Saito ,  Shintaro Ito ,  Sachie Tajima ,  Hiroto Ebara ,  Taisuke Ono

IPC: G06F11/10 ,  G06F11/07 ,  G06F11/14

CPC classification number: G06F11/1076 ,  G06F11/0772 ,  G06F11/1469

Abstract: In each node constituting a storage system, there is at least one of a storage area (user area) in which a user data set is stored and a storage area (parity area). For the node having the user area, there is user part difference information including information indicating whether or not to be in presence of difference for each user area of the node. For the node having the parity area, there is parity part difference information including the information indicating whether or not to be in the presence of difference for each parity area of the node. Out of the parity part difference information, the information corresponding to the parity area is the information indicating the presence of difference when there is the information indicating the presence of difference in the storage area of any of the data sets used for generating the parity stored in the parity area.

公开(公告)号：US12056366B2

公开(公告)日：2024-08-06

申请号：US17940371

申请日：2022-09-08

Applicant: Hitachi, Ltd.

Inventor： Taisuke Ono ,  Hideo Saito ,  Takaki Nakamura ,  Takahiro Yamamoto

IPC: G06F3/06

CPC classification number: G06F3/0614 ,  G06F3/0635 ,  G06F3/0659 ,  G06F3/067

Abstract: A volume to be accessed by a host is provided. A reliability policy related to data reliability and a performance policy related to response performance to an access to the volume are set in the volume. A node that processes redundant data of data for a node that processes the data related to the volume is determined based on the reliability policy. The determined node returns a result of an access to the volume from the host according to the performance policy.