Handling data extent size asymmetry during logical replication in a storage system
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United States of America Patent
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Mar 5, 2019
Grant Date -
Mar 21, 2013
app pub date -
Sep 20, 2011
filing date -
Sep 20, 2011
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Abstract
A technique to name data is disclosed to allow preservation of storage efficiency over a link between a source and a destination in a replication relationship as well as in storage at the destination. The technique allows the source to send named data to the destination once and refer to it by name multiple times in the future, without having to resend the data. The technique also allows the transmission of data extents to be decoupled from the logical containers that refer to the data extents. Additionally, the technique allows a replication system to accommodate different extent sizes between replication source and destination while preserving storage efficiency.
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