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Parameterized lock management system and method for conditional conflict serializability of transactions

  • US 5,983,225 A
  • Filed: 01/26/1998
  • Issued: 11/09/1999
  • Est. Priority Date: 01/26/1998
  • Status: Expired due to Fees
First Claim
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1. A resource lock management system, comprising:

  • a lock data structure storing lock data representing granted and pending resource lock requests, wherein the data representing each granted and pending resource lock request includes;

    data indicating a resource to which access has been granted or requested, and an access mode associated with the resource lock request;

    wherein a subset of the granted and pending resource lock requests are parameterized resource lock requests and the data representing each resource lock request in the subset further includes one or more parameter values indicating a data reliability classification associated with the resource lock request; and

    a lock manager for evaluating, granting and denying resource lock requests, including determining when a resource lock request is unconditionally conflicting with any granted resource lock request, determining when the resource lock request is conditionally conflicting with any granted resource lock request, and evaluating the resource lock request with respect to each conditionally conflicting granted resource lock request by performing a predefined comparison of the parameter values for the resource lock request with the parameter values for each conditionally conflicting granted resource lock request.

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