Parallel replication mechanism for state information produced by serialized processing

  • US 20020161789A1
  • Filed: 03/20/2002
  • Published: 10/31/2002
  • Est. Priority Date: 03/21/2001
  • Status: Active Grant
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First Claim
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1. A method for parallel replication of state information of a first data processing unit in at least one second data processing unit, each of the at least one second data processing units having a replica of the state information of the first data processing unit, the method comprising:

  • processing an incoming request message for changing the state information in the first data processing unit;

    sending a response message to a sender of the incoming request message after confirming a receipt of a modification record for the incoming request message and modification records of all predecessors of the incoming request message by each of the at least one first storage subsystems; and

    updating state information in the replica of each of the at least one second data processing units based on the modification records, wherein the incoming request message contains an indicator and a modification record contains the indicator assigned to a corresponding incoming request message and all corresponding changes applied to a set of records used to represent the state information of the first data processing unit.

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