US 2006/0149791 A1 · Database-driven distributed recovery

Abstract

A method and apparatus for database-driven distributed recovery is provided. According to one aspect, a transaction manager sends, to one or more resource managers, connection information that indicates how to connect to the transaction manager. A resource manager that receives the connection information establishes an association between the connection information and the distributed transaction for which the connection information was received. If the resource manager is ever in doubt concerning whether the distributed transaction should be committed, the resource manager uses the associated connection information to send, to the transaction manager, a request for status information. The transaction manager maintains status information that indicates whether the distributed transaction should be committed, and responds to the resource manager with the requested status information. The resource manager receives the status information and, based on the status information, either commits or rolls back its portion of the distributed transaction.

Claims30

Dependent claims

A method of recovering distributed transactions, the method comprising:

receiving first connection information that indicates how to connect to a first transaction manager;
establishing an association between the first connection information and a first transaction that is managed by the first transaction manager;
determining whether a commitment status of the first transaction is certain;
and
in response to a determination that the commitment status of the first transaction is not certain, performing steps comprising:
based on the association between the first transaction and the first connection information, establishing a first connection to the first transaction manager using the first connection information;
and
sending, through the first connection, a request for first status information that indicates whether the first transaction should be committed.

5 more elements

A method of performing distributed transactions, the method comprising:

sending, to a first resource manager participating in a first transaction, connection information that indicates how to connect to a transaction manager;
receiving one or more first messages that indicate whether one or more resource managers that are participating in the first transaction are prepared to commit respective portions of the first transaction;
determining, based on the one or more first messages, whether at least one resource manager is not prepared its portion of to commit the first transaction;
based on the one or more first messages, storing first status information that indicates whether the first transaction should be committed;
establishing an association between the first transaction and the first status information;
receiving, from the first resource manager, a first request that identifies the first transaction;
and
in response to receiving the first request, sending the first status information to the first resource manager.

5 more elements

Dependencies are inferred from the claim text.

Database-driven distributed recovery

Life of this patent

Database-driven distributed recovery

Life of this patent

Abstract

Claims30