Essential metadata replication
First Claim
1. A method, comprising:
- receiving, by a storage system, a storage request;
identifying, based on the storage request, one or more storage management units;
identifying, for each of the storage management units, one or more master partition tables having multiple master entries and one or more backup partition tables, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries; and
upon detecting a failure in master partition table, configuring one of the backup partition tables as a replacement master partition table, calculating, using essential metadata in the replacement master partition table, non-essential metadata, and storing the calculated non-essential metadata to the replacement master partition table.
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Accused Products
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.
85 Citations
19 Claims
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1. A method, comprising:
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receiving, by a storage system, a storage request; identifying, based on the storage request, one or more storage management units; identifying, for each of the storage management units, one or more master partition tables having multiple master entries and one or more backup partition tables, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries; and upon detecting a failure in master partition table, configuring one of the backup partition tables as a replacement master partition table, calculating, using essential metadata in the replacement master partition table, non-essential metadata, and storing the calculated non-essential metadata to the replacement master partition table. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A storage system, comprising:
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a memory configured to store multiple one or more master partition tables and multiple one or more backup partition tables; and a processor configured to receive a storage request, to identify, based on the storage request, one or more storage management units, and to identify, for each of the storage management units, one of the master partition tables having multiple master entries and the one or more backup partition tables, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries;
wherein upon detecting a failure in master partition table, the processor is configured to configure one of the backup partition tables as a replacement master partition table by calculating, using essential metadata in the replacement master partition table, non-essential metadata, and storing the calculated non-essential metadata to the replacement master partition table. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A computer program product, the computer program product comprising:
a non-transitory computer readable storage medium having computer readable program code embodied therewith, the computer readable program code comprising; computer readable program code configured to identify, based on the storage request, one or more storage management units; computer readable program code configured to identify, for each of the storage management units, one or more master partition tables having multiple master entries and one or more backup partition tables, each of the backup partition tables having backup entries in a one-to-one-correspondence with the master entries; and computer readable program code configured to configure, upon detecting a failure in master partition table, one of the backup partition tables as a replacement master partition table, to calculate, using essential metadata in the replacement master partition table, non-essential metadata, and to store the calculated non-essential metadata to the replacement master partition table.
Specification