System and method for discovery based data recovery in a store and forward replication process
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United States of America Patent
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Nov 3, 1998
Grant Date -
N/A
app pub date -
Jun 26, 1996
filing date -
Jun 26, 1996
priority date (Note) -
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Abstract
Systems and methods for discovery based data recovery in a store and forward replication system are presented. Data loss is discovered by comparing a list of changes made to a local copy of a replica object with a list of changes received over the network from other nodes also having a copy of the replica object. When the list of changes received contains changes that the local list does not, the local system knows its copy of the replica object is not up-to-date. Missing changes are then requested from other systems having the missing data. In making the request, care is taken to minimize the cost incurred in recovering the missing data and to balance network traffic among several other nodes, if possible.
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