发明授权
- 专利标题: System and method of disaster recovery
- 专利标题(中): 灾难恢复系统和方法
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申请号: US11802186申请日: 2007-05-21
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公开(公告)号: US07860824B2公开(公告)日: 2010-12-28
- 发明人: Yoshio Suzuki , Nobuo Kawamura , Shinji Fujiwara , Satoru Watanabe , Kazuhiko Mizuno
- 申请人: Yoshio Suzuki , Nobuo Kawamura , Shinji Fujiwara , Satoru Watanabe , Kazuhiko Mizuno
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Stites & Harbison, PLLC
- 代理商 Juan Carlos A. Marquez, Esq
- 优先权: JP2007-066429 20070315
- 主分类号: G06F7/00
- IPC分类号: G06F7/00
摘要:
In a DR system, from the viewpoint of device cost, when search is not carried out, a physical application where log recovery is available by inexpensive DB appliance server is adopted. Further, a local mirror operation at a secondary site is not carried out. Furthermore, from the viewpoint of operation, by a log apply function unit, the tendencies of a log application and operations are monitored, and a search process is accepted according to the progress conditions of the log application. When the log application does not catch up sufficiently, the search is not accepted. Moreover, when a consistency guarantee of a secondary DB is made, not transactions in process at the moment of search instruction are undone (rolled back), but only transactions in process at the moment of a search instruction are redone (rolled forward).
公开/授权文献
- US20080229140A1 System and method of disaster recovery 公开/授权日:2008-09-18