Metadata based file switch and switched file system
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United States of America Patent
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Jun 3, 2008
Grant Date -
Jul 8, 2004
app pub date -
Jan 2, 2003
filing date -
Jan 11, 2001
priority date (Note) -
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Abstract
An apparatus and method are provided in a computer network to decouple client computers from file servers, by placing a transparent network node, also termed a file switch or file switch computer, between the client computers and the file servers. Usage of such a file switch allows reduced latency in file transfers, as well as scalable mirroring, striping, spillover, and other features. The file switch preferably includes at least one processing unit for executing computer programs, at least one port for exchanging information with the file servers and client computers, and a file aggregation module. The file aggregation module includes computer programs for determining a set of file servers from the group of file servers for storing a specified user file, creating a metadata file storing information identifying the set of file servers for storing the user file; and updating directory structures on the set of file servers to indicate storage of the user file.
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