Parallel file system and method with byte range API locking
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Jul 11, 1997
filing date -
Jul 11, 1997
priority date (Note) -
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Abstract
A computer system having a shared disk file system running on multiple computers each having their own instance of an operating system and being coupled for parallel data sharing access to files residing on network attached shared disks. Access to a file by a processor node is controlled by tokens transferred to the node from a token manager. To prevent another processor node from removing a token after the token has been received, but before it performs the operation on the file, each process can lock the token after it has been received. A node with a token can lock a byte range of a file, which byte range may include all or only some of byte range cornered by the token.
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