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Access control method with plural users having I/O commands prioritized in queues corresponding to plural memory units

  • US 6,223,243 B1
  • Filed: 06/05/1998
  • Issued: 04/24/2001
  • Est. Priority Date: 06/12/1997
  • Status: Expired due to Term
First Claim
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1. An access control method having plural users and plural auxiliary memory units, said method comprising the steps of:

  • adding priority information for each user to an input/output (IO) command entered by said each user for one of said auxiliary memory units and forming, for each user, a list of prioritized IO commands prioritized with respect to all IO commands associated with said each user;

    storing a plurality of the prioritized IO commands in an IO queue corresponding to said one auxiliary memory unit;

    issuing the plurality of prioritized IO commands of all of said users stored into said IO queue in a sequence of the priority information added to said prioritized IO command irrespective of who the entrant users are; and

    executing the plurality of prioritized IO commands.

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