Reducing data copy operations for writing data from a network to storage of a cached data storage system by organizing cache blocks as linked lists of data fragments
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United States of America Patent
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May 3, 2005
Grant Date -
Jun 3, 2004
app pub date -
Dec 2, 2002
filing date -
Dec 2, 2002
priority date (Note) -
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Abstract
In a network attached cached disk storage system, data is transmitted over the network in data packets having a data length that is much smaller than the logical block size for reading or writing to disk storage. To avoid copying of data from network port buffers to the cache memory, the cache blocks of the cache memory are organized as linked lists of list elements, which can be used as network port input or output buffers. For TCP data packets, for example, each list element has a data slot for storing up to 1,500 bytes, and a field indicating the number of bytes stored in the data slot.
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