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Highly available database clusters that move client connections between hosts

  • US 20020129146A1
  • Filed: 02/06/2002
  • Published: 09/12/2002
  • Est. Priority Date: 02/06/2001
  • Status: Abandoned Application
First Claim
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1. A database cluster which avoids client failure by connecting to multiple nodes of the cluster, the database cluster comprising:

  • a first computing system including;

    a primary connection manager which forms a client connection with and receives transactions from at least one client, and a primary database management system (DBMS) which communicates with the primary connection manager to receive the transactions and executes the transactions on data stored in one or more data files; and

    a second computing system including;

    a secondary connection manager, and a secondary DBMS which communicates with the secondary connection manager and can access data stored in the one or more data files, wherein when the second connection manager determines that a predetermined condition is met, the second connection manager receives data from the client connection, replays incomplete portions of open transactions on the data through the secondary DBMS, and begins to receive additional transactions from the at least one client to be executed against the one or more data files.

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