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Independent distributed database system

  • US 5,924,094 A
  • Filed: 11/01/1996
  • Issued: 07/13/1999
  • Est. Priority Date: 11/01/1996
  • Status: Expired due to Term
First Claim
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1. A distributed relational database system for a computer network, said system comprising:

  • a plurality of sites;

    each of said sites including processing means for storing and retrieving information locally and independent of said other sites, and wherein each of said sites is the logical peer of said other sites;

    said sites having means for connecting to said network and communicating with other sites connected to the network;

    said processing means including means for transferring selected information stored locally by connecting to said network and transferring said selected information to other sites connected to the network;

    wherein said database system comprises a plurality of activities and each activitiectivities comprises selected sites belonging to an activity group;

    wherein said sites comprise spine sites and non-spine sites, said spine sites exhibiting high availability to the network, and said non-spine sites exhibiting low availability to the network;

    means for selectively manning said snine sites comprising a spanning tree having nodes corresponding to said spine sites; and

    means for removing a spine site from said spanning tree in response to a site leaving said activity group.

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