METHOD FOR METADATA PERSISTENCE
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United States of America Patent
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N/A
Issued Date -
Jul 18, 2013
app pub date -
Jan 12, 2012
filing date -
Jan 12, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Providing automatic updating of the mapped and unmapped extents in the metadata disk layout for a transaction. A transaction contains mapped and unmapped extents changes. The mapped extents changes can be anywhere in the metadata data disk area of 10 MB and also the unmapped area. A write journal will be added to every migration. For every migration a transaction is created and that contains mapped and unmapped changes. After reboot write journal will be applied. For providing greater data integrity block level sequence number, block number and CRC is maintained for secondary and primary copy.
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