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Generated January 23, 2018

One-phase commit in a shared-nothing database system

Patent Number: 6,845,384

Patent Information

Techniques are provided for handling distributed transactions in shared-nothing database systems where one or more of the nodes have access to a shared persistent storage. Rather than coordinate the distributed transaction using a two-phase commit protocol, the coordinator of the distributed transaction uses a one-phase commit protocol with those participants that have access to the transaction status information maintained by the coordinator. The transaction status information may reside, for example, in the redo log of the coordinator. In the case that the coordinator fails, those participants can determine the state of the distributed transaction based on information stored on the shared disk. In addition, the coordinator is able to determine whether it is possible to commit the distributed transaction based on information that is stored on the shared disk by the participants, without those participants entering a formal “prepared” state.
Patent Number: 6,845,384
Issue Date: 2005-01-18

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Patents cited by this patent

Patent Title
6,711,571 Partitioning ownership of a database among different database servers to control access to the database
6,636,248 Method and system for visually delineating a relationship between related graphical windows in a graphical user interface
6,567,811 Method and system to merge volume groups on a UNIX-based computer system
6,567,509 Method and system to extend functionality of voice processing systems
6,480,895 Integration of objects including Java bytecodes with legacy 3270 applications
6,438,714 Method and apparatus for testing large arrays of storage devices
6,370,619 Managing partitioned cache
6,341,340 Transitioning ownership of data items between ownership groups
6,321,238 Hybrid shared nothing/shared disk database system
6,253,229 Hotspots only interfaces to links in hypertext document pages in network display stations
6,011,918 Methods, systems and computer program products for generating client/server applications
5,892,754 User controlled adaptive flow control for packet networks

Patents that cite this patent

Patent Title
9,159,050 Providing atomicity for a unit of work
8,825,601 Logical data backup and rollback using incremental capture in a distributed database
8,521,682 Transfer of data from transactional data sources to partitioned databases in restartable environments
8,296,269 Apparatus and method for read consistency in a log mining system
8,156,084 Transfer of data from positional data sources to partitioned databases in restartable environments
8,140,498 Distributed database system by sharing or replicating the meta information on memory caches
8,140,497 System and method for implementing nonblocking zero-indirection transactional memory
8,074,220 System and method for interfacing an application to a distributed transaction coordinator
7,933,873 Handling transfer of bad data to database partitions in restartable environments
7,725,446 Commitment of transactions in a distributed system
7,275,072 Data processing system and method with data sharing for the same
6,970,872 Techniques for reducing latency in a multi-node system when obtaining a resource that does not reside in cache
6,957,236 Providing a useable version of a data item

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