Asymmetric asynchronous mirroring for high availability
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United States of America Patent
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Mar 25, 2014
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N/A
app pub date -
Mar 29, 2012
filing date -
Mar 29, 2012
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Abstract
Maintaining data at a failover site includes an application writing data at a primary site corresponding to the failover site, where data is transferred asynchronously from the primary site to the failover site, the application issuing an application check point and initiating a system check point in response to the application issuing the application check point, where the system check point causes data at the failover site to be consistent with the primary site. The application check point may complete only after the system check point completes. The application check point may complete independently of completion of the system check point. The application check point may complete either only after the system check point completes or independently of completion of the system check point according to a specific criteria.
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