公开(公告)号：US10776044B2

公开(公告)日：2020-09-15

申请号：US16291945

申请日：2019-03-04

Applicant: HITACHI, LTD.

Inventor： Shinya Hayashi ,  Toshiaki Terao ,  Shintaro Ito ,  Atsushi Tashiro

IPC: G06F12/00 ,  G06F3/06 ,  G06F12/0831 ,  G06F12/084

Abstract: A server including a memory unit, a processor unit, and a storage device, wherein the memory unit has: a CM; an SM which stores management information; and a log buffer for storing log data indicating contents of change to the CM and the SM. The storage device has a log chunk for storing the log data, and the processor unit is configured to: store target data corresponding to an I/O request in the CM; generate log data of contents of change with respect to the CM and the SM, and to store the pieces of the generated log data in the log buffer; write a plurality of pieces of log data stored in the log buffer into the log chunk; and transmit, after all of the pieces of log data corresponding to the I/O request are written into the log chunk, a response of good to a request source.

公开(公告)号：US10657062B2

公开(公告)日：2020-05-19

申请号：US15821997

申请日：2017-11-24

Applicant: HITACHI, LTD.

Inventor： Atsushi Tashiro ,  Shintaro Ito ,  Takeru Chiba ,  Shinya Hayashi ,  Satoshi Kamijo

IPC: G06F12/0873 ,  G06F11/10

Abstract: A first node retains node management information for managing each of the nodes, presence or absence in the first node of a transfer target data set, a write destination, which is a strip in a node area of the node. Concerning the second nodes, this is each of the nodes other than the first node, the first node: (A) when specifying from the node management information that there are two or more transfer target data sets, write destinations that are respectively two or more strips in a node area of the second node, specifies two or more intra-node positions respectively corresponding to the two or more transfer target data sets; and (B) transmits, to the second node, one command for transfer, transfer targets of which are two or more transfer target data sets respectively present in the specified two or more intra-node positions.