发明名称 |
Method and apparatus for remote data duplexing |
摘要 |
<p>A system for asynchronously duplexing direct access storage device (DASD) data in a plurality of DASD subsystems has the advantage of decoupling the data duplexing operation from the DASD write I/O operation. This ensures the write does not incur unnecessary wait states in the subsystem. By establishing a sequence checkpoint at which time a set of information packets are grouped together and processed as a single sequence unit, this decoupling and independent operation takes place. Through this independence, data copying to a secondary location can take place without affecting the performance of the subsystems and also not affecting the corresponding integrity of the data that is being updated. <IMAGE></p> |
申请公布号 |
EP0602822(B1) |
申请公布日期 |
2000.09.06 |
申请号 |
EP19930309576 |
申请日期 |
1993.12.01 |
申请人 |
INTERNATIONAL BUSINESS MACHINES |
发明人 |
MICKA, WILLIAM FRANK;MIKKELSEN, CLAUS WILLIAM;SHOMLER, ROBERT WESLEY |
分类号 |
G06F12/16;G06F11/20;(IPC1-7):G06F11/14 |
主分类号 |
G06F12/16 |
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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