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US 8,805,855 B2Granted
Efficiently storing and retrieving data and metadata
AssigneeInternational Business Machines Corporation
InventorsBen Sasson, Ori Shalev
Life of this patent
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AssigneeInternational Business Machines Corporation
InventorsBen Sasson, Ori Shalev
Estimating the term…
For efficiently storing and retrieving data and metadata in phases, in a first phase, metadata tokens, which are assigned to most active metadata-emitting entities, are used for storing the data and the metadata together in a single input/output operation while piggybacking the metadata of least active metadata-emitting entities onto one of the most active metadata-emitting entities having one of the metadata tokens. In a second phase, the metadata is re-written to a metadata delta journal for reclaiming the metadata tokens. In a third phase, the metadata journal is applied to a metadata structure containing the metadata of the storage system, the metadata delta journal is then cleared after successfully updating the main metadata structure with the metadata of the metadata journal. The metadata journal is swapped with an empty metadata journal for concurrently adding metadata while retaining the metadata journal until applying the metadata delta journal to the metadata structure.
A system for efficiently storing and retrieving data and metadata in a plurality of phases in a storage system, the system comprising:
A computer program product for efficiently storing and retrieving data and metadata in a plurality of phases in a storage system using a processor device, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:
Dependencies are inferred from the claim text.