Essential metadata replication
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United States of America Patent
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Aug 22, 2017
Issued Date -
N/A
app pub date -
Apr 11, 2016
filing date -
Apr 16, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Methods, apparatus and computer program products implement embodiments of the present invention that include defining, in a storage system including receiving, by a storage system, a storage request, and identifying, based on the storage request, one or more storage management units. For each of the storage management units, a master partition table having multiple master entries and one or more backup partition tables is identified, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries. Upon detecting a failure in master partition table, one of the backup partition tables is configured as a replacement master partition table, essential metadata is used to calculate non-essential metadata in the replacement master partition table, and the calculated non-essential metadata is stored to the replacement master partition table.
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