Flexible data replication mechanism
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United States of America Patent
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-
Sep 20, 2005
Grant Date -
Oct 2, 2003
app pub date -
Mar 26, 2002
filing date -
Mar 26, 2002
priority date (Note) -
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Abstract
A data replication management (DRM) architecture comprising a plurality of storage cells interconnected by a fabric. Flexibility in connectivity is provided by configuring each storage cell port to the fabric to handle both host data access requests and DRM traffic. Each storage cell comprises one or more storage controllers that can be connected to the fabric in any combination. Processes executing in the storage controller find a path to a desired destination storage cell. The discovery algorithm implements a link service that exchanges information related to DRM between the storage controllers. The DRM architecture is symmetric and peer cooperative such that each controller and storage cell can function as a source and a destination of replicated data. The DRM architecture supports parallel and serial 'fan-out' to multiple destinations, whereby the multiple storage cells may implement data replicas.
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