Locator Table and Client Library for Datacenters
First Claim
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1. A method comprising:
- identifying, by a client system, at least one server as being associated with a tract of data, the tract of data being one of a plurality of tracts of data comprising a byte sequence and the identifying includes looking up the at least one server in a locator table that distributes the tracts among a plurality of servers, the locator table distributing the tracts by associating servers with tracts based at least in part on translations to fixed lengths of tract identifiers; and
providing, by the client system, a request associated with the tract to the at least one server.
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Abstract
A system including a plurality of servers, a client, and a metadata server is described herein. The servers each store tracts of data, a plurality of the tracts comprising a byte sequence and being distributed among the plurality of servers. To locate the tracts, the metadata server generates a table that is used by the client to identify servers associated with the tracts, enabling the client to provide requests to the servers. The metadata server also enables recovery in the event of a server failure. Further, the servers construct tables of tract identifiers and locations to use in responding to the client requests.
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Citations
20 Claims
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1. A method comprising:
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identifying, by a client system, at least one server as being associated with a tract of data, the tract of data being one of a plurality of tracts of data comprising a byte sequence and the identifying includes looking up the at least one server in a locator table that distributes the tracts among a plurality of servers, the locator table distributing the tracts by associating servers with tracts based at least in part on translations to fixed lengths of tract identifiers; and providing, by the client system, a request associated with the tract to the at least one server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-readable storage medium comprising:
a plurality of computer-readable instructions stored on the storage medium and configured to program a metadata server system to perform operations including; generating a locator table that distributes a plurality of tracts of data among a plurality of servers by associating servers with tracts based at least on a number of available servers and on translations to fixed lengths of tract identifiers, the translations ensuring that two sequential tracts are associated with different servers; and making available the locator table to at least one client system. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A client system comprising:
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a processor; and a plurality of executable instructions configured to be operated by the processor to program the client system to perform operations including; determining whether a byte sequence has been opened in an append mode or a random write mode; in response to determining that the byte sequence has been opened in an append mode, requesting allocation of a tract of data belonging to the byte sequence and writing to the requested tract; and in response to determining that the byte sequence has been opened in a random write mode, writing to a tract of data belonging to the byte sequence. - View Dependent Claims (19, 20)
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Specification