METHOD AND SYSTEM FOR SERVICE-AWARE DATA PLACEMENT IN A STORAGE SYSTEM
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United States of America Patent
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Issued Date -
Jul 23, 2015
app pub date -
Jan 23, 2014
filing date -
Jan 23, 2014
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Abstract
A method and system for service-aware data placement. The method includes receiving a service notification specifying a target SD and, after receiving the service notification, receiving a request to write data, writing a RAID stripe that includes data blocks and a parity block, where the parity block is not stored on the target SD and none of the data blocks is stored on the target SD. The method further includes performing a modified garbage collection operation that includes identifying a live RAID stripe with includes N data blocks, writing a new RAID stripe that includes N−1 data blocks and a second parity block, where the second parity block and none of the N−1 data blocks is stored on the target SD, and issuing a removal notification that indicates that the target SD may be removed.
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