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RECORDING MEDIUM STORING UPDATE PROCESSING PROGRAM FOR STORAGE SYSTEM, UPDATE PROCESSING METHOD, AND STORAGE SYSTEM

  • US 20100138625A1
  • Filed: 11/19/2009
  • Published: 06/03/2010
  • Est. Priority Date: 11/28/2008
  • Status: Abandoned Application
First Claim
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1. A computer-readable recording medium encoded with an update processing program containing instructions executable on a computer, the computer included in a storage system that stores data distributedly among a plurality of storage devices, the program causing the computer to execute:

  • a procedure in which, when a data writing request to write data to the plurality of storage devices is received, a synchronous and asynchronous instruction unit instructs a reading and writing control unit, which hasa synchronous mode for directly writing write data into the plurality of storage devices andan asynchronous mode for accumulating the write data in a cache memory and for writing the accumulated data in the plurality of storage devices at a specific timing,to perform data writing using either the synchronous mode or the asynchronous mode; and

    a process control procedure in which a process control unit executes update processingfor controlling an operation of a process that is executing specific service processing and a new process,for instructing, when an update is requested, the synchronization and asynchronization instructing unit to switch the reading and writing control unit, which is set in the asynchronous mode while the process is executing the service processing, to the synchronous mode,for issuing an end instruction to the process to cause the process to end the service processing in a state in which the write data output by the process is directly written in the storage device, andfor starting service processing of the new process after the process ends the service processing.

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