Compaq Computer Corporation, Inc.

Compaq Information Technologies Group, L.p.

Keith B Evans

Sitaram V Lanka

Johannes Klein

Albert C Gondi

Roger J Hansen

A protocol for a transaction involving two homogeneous or two heterogeneous computing systems involves starting a transaction on one of the two systems, sending a request for participation in the transaction to an application resident on the other of the two systems, together with an identification and address of the transaction. Upon receipt of the request, the application will initiate a subordinate transaction through a resident (subordinate) transaction manager. The subordinate transaction manager will notify the Beginner transaction manager and at the same time cause the application to start work on the request. Later, the subordinate transaction, through the subordinate transaction manager participates in a two-phase commit protocol that concludes the transaction to ensure that all changes effected by the transaction are done, or none are done, i.e., the transaction is aborted.

Method and apparatus for conducting a transaction between homogeneous and/or heterogeneous transaction processing systems using asynchronous pull of a transaction transfer

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Fremont, CA, United States of America

Keith B Evans