发明名称 |
Disaster recovery processing method and apparatus and storage unit for the same |
摘要 |
A technique capable of constructing a disaster recovery system reduced in performance degradation of a primary system is provided. The technique includes a step of conducting synchronous writing of log information into a secondary storage subsystem in a secondary system when a write request received from a host computer is a write request of log information, a step of temporarily storing a write request and conducting asynchronous writing into the secondary storage subsystem when the received write request is a write request of database data or status information, a step of modifying log information, data in a database area, and status information in the secondary storage subsystem according to contents of a write request received from a primary storage subsystem, and a step of recovering the database area according to contents of log information in a location indicated by the status information. |
申请公布号 |
US7562103(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20050227180 |
申请日期 |
2005.09.16 |
申请人 |
HITACHI, LTD.;HITACHI SOFTWARE ENGINEERING CO., LTD. |
发明人 |
KAWAMURA NOBUO;YAMAGUCHI KOTA;OEDA TAKASHI |
分类号 |
G06F3/06;G06F17/30;G06F11/00;G06F11/14;G06F11/20;G06F12/00 |
主分类号 |
G06F3/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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