Resynchronization of replicated data
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United States of America Patent
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Sep 20, 2016
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N/A
app pub date -
Nov 29, 2011
filing date -
Nov 29, 2011
priority date (Note) -
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Abstract
Mechanisms are provided for efficient resynchronization of replicated data. A hash value is generated for a chunk of data replicated from a source node to a target node. The chunk of data may be a file deduplicated and compressed at both a source node and a target node. A current sequence number is determined and a sequence number and hash tuple is maintained for the chunk of data at both the source node and the target node. Sequence numbers are modified whenever the data is modified. Current sequence numbers and sequence number and hash values in the sequence number hash tuples at the source node and the target node may be compared to determine whether data is still synchronized at a later point in time or whether data requires resynchronization.
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