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1. (WO2017064770) STORAGE SYSTEM AND CONTROL METHOD FOR STORAGE SYSTEM

Pub. No.:    WO/2017/064770    International Application No.:    PCT/JP2015/079051
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Thu Oct 15 01:59:59 CEST 2015
IPC: G06F 11/20
G06F 11/14
G06F 12/00
Applicants: HITACHI, LTD.
株式会社日立製作所
Inventors: SATOYAMA, Ai
里山 愛
KAWAGUCHI, Tomohiro
川口 智大
NASU, Hiroshi
那須 弘志
Title: STORAGE SYSTEM AND CONTROL METHOD FOR STORAGE SYSTEM
Abstract:
In order to create, at a remote site, a specific-point-in-time backup of a volume while minimizing the response time required to update the volume, there is provided a storage system in which: a first storage device and a second storage device transfer a journal stored in a first journal volume to the second storage device; the second storage device writes the transferred journal to a second journal volume; the second storage device reads the journals in the second journal volume in order from the earliest journal; the second storage device causes the read journals to be reflected in a second data volume; the first storage device creates, in the first journal volume, a journal including a marker, when a specific condition is met; and the second storage device creates a snapshot of the second data volume upon detecting a marker in a read journal.