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Method, system, and program for managing data read operations on network controller with offloading functions

  • US 7,349,999 B2
  • Filed: 12/29/2003
  • Issued: 03/25/2008
  • Est. Priority Date: 12/29/2003
  • Status: Expired due to Fees
First Claim
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1. A system for use with a network and an initiator coupled to the network, comprising:

  • at least one memory which includes an operating system;

    a processor coupled to the memory;

    a bus;

    target storage adapted to store target data at target addresses of said data storage;

    a target controller coupled to the bus, for managing Input/Output (I/O) access to the target storage, including processing read commands addressing target data having target addresses within said target storage;

    a device driver executable by the processor in the memory; and

    a network controller coupled to the bus and having an offload engine and a cache adapted to store target data from at least one target address of said target storage, said network controller being adapted to;

    receive from the initiator, a packet containing a read command which addresses target data having a target address within said target storage; and

    compare the target address of the read command to a target address of the target data in the cache for the network controller engine;

    wherein said offload engine is adapted to process said read command if target data stored in the cache was obtained from a target address which corresponds to the read command target address, said processing including sending target data stored in the cache through the network to the initiator and wherein said read command is processed by said network controller instead of said target controller.

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