Data replication among storage systems
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United States of America Patent
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Dec 19, 2006
Issued Date -
N/A
app pub date -
Aug 27, 2003
filing date -
Jun 27, 2003
priority date (Note) -
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Abstract
A first storage system stores information relating to the updating of data stored in that system as a journal. More specifically, the journal is composed of a copy of data that was used for updating and update information such as a write command used during updating. Furthermore, the second storage system acquires the journal via a communication line between the first storage system and the second storage system. The second storage system holds a duplicate of the data held by the first storage system and updates the data corresponding to the data of the first storage system in the data update order of the first storage system by using the journal.
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