Fast data recovery system
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United States of America Patent
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Jul 19, 2011
Grant Date -
Apr 9, 2009
app pub date -
Aug 11, 2008
filing date -
Oct 8, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A data processing method includes receiving data objects for storage by a primary storage device. A first instance of each of at least some of the received data objects is cached in a disaster-proof storage unit. A second instance of each received data object is sent for storage in a secondary storage device.A list of identifiers of the data objects that are cached in the disaster-proof storage unit at a given point in time is sent from the disaster-proof storage unit to the secondary storage device. Following an event that renders at least some of the data objects on the primary storage device inaccessible, a request sent to the secondary storage device to access a given data object is received. A selection is made, responsively to the list, to serve the cached first instance or the stored second instance of the given data object in response to the request.
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