Distributed Data Storage System with Key-Based Addressing
First Claim
1. A data storage method comprising:
- receiving, from at least one writing entity within a host, a request to write a container of data that is identified by a unique key that is independent of physical storage identifiers and that comprises a set of data chunks;
determining, from the key, a plurality of storage devices in which to store the data chunks; and
storing the chunks in respective, different ones of the plurality of storage devices as determined from the key.
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Abstract
In a Distributed Virtual Array data storage system, a storage pool receives, from at least one writing entity within a host, a request to write a container of data that is identified by a unique key that is independent of physical storage identifiers and that comprises a set of data chunks. The key indicates a plurality of storage devices in which to store the data chunks, which are accordingly stored in those storage devices. Different combinations, each comprising a layout map, of storage devices are represented in a layout table. Information in the container key is used to select which layout map to use for the chunks of each container. An error-correction chunk is preferably also stored along with the chunks of each container so as to enable data container reconstruction in case of storage device failure.
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Citations
25 Claims
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1. A data storage method comprising:
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receiving, from at least one writing entity within a host, a request to write a container of data that is identified by a unique key that is independent of physical storage identifiers and that comprises a set of data chunks; determining, from the key, a plurality of storage devices in which to store the data chunks; and storing the chunks in respective, different ones of the plurality of storage devices as determined from the key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A data storage system comprising:
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a plurality of storage devices; a storage pool receiving, from at least one writing entity within a host, a request to write a container of data that is identified by a unique key that is independent of physical storage identifiers and that comprises a set of data chunks; said storage pool including a driver configured for determining, from the key, in which of the plurality of storage devices to store the data chunks; and said storage pool further including chunk stores for storing the chunks in respective, different ones of the plurality of storage devices as determined from the key. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification