Data Stream Management System
Encyclopedia
A Data-stream management system (DSMS) is a computer program
that controls the maintenance
and querying
of data in data stream
s.
A key feature of these DSMSs is the ability to execute a continuous query against a data stream. The use of a DSMS to manage a data stream is roughly analogous to the use of a database management system
(DBMS) to manage a conventional database
. A conventional database query executes once and returns a set of results for a given point in time. In contrast, a continuous query continues to execute over time, as new data enters the stream. The results of the continuous query are updated as new data appears.
Early data-stream management systems include Wisconsin's NiagaraCQ , Stanford's Stream, Berkeley's TelegraphCQ (based on the earlier CACQ System ), and MIT/Brown/Brandeis's Aurora/Borealis .
Computer program
A computer program is a sequence of instructions written to perform a specified task with a computer. A computer requires programs to function, typically executing the program's instructions in a central processor. The program has an executable form that the computer can use directly to execute...
that controls the maintenance
Data maintenance
Data maintenance is the adding, deleting, changing and updating of binary and high-level files, and the real world data associated with those files. Data can be maintained manually and/or through an automated program, but at origination and translation/delivery point must be translated into a...
and querying
Information retrieval
Information retrieval is the area of study concerned with searching for documents, for information within documents, and for metadata about documents, as well as that of searching structured storage, relational databases, and the World Wide Web...
of data in data stream
Data stream
In telecommunications and computing, a data stream is a sequence of digitally encoded coherent signals used to transmit or receive information that is in the process of being transmitted....
s.
A key feature of these DSMSs is the ability to execute a continuous query against a data stream. The use of a DSMS to manage a data stream is roughly analogous to the use of a database management system
Database management system
A database management system is a software package with computer programs that control the creation, maintenance, and use of a database. It allows organizations to conveniently develop databases for various applications by database administrators and other specialists. A database is an integrated...
(DBMS) to manage a conventional database
Database
A database is an organized collection of data for one or more purposes, usually in digital form. The data are typically organized to model relevant aspects of reality , in a way that supports processes requiring this information...
. A conventional database query executes once and returns a set of results for a given point in time. In contrast, a continuous query continues to execute over time, as new data enters the stream. The results of the continuous query are updated as new data appears.
Early data-stream management systems include Wisconsin's NiagaraCQ , Stanford's Stream, Berkeley's TelegraphCQ (based on the earlier CACQ System ), and MIT/Brown/Brandeis's Aurora/Borealis .
External links
- Using Data Stream Management Systems for Traffic Analysis: A Case Study
- Aurora: A Data Stream Management System
- STREAM: Stanford Stream Data Manager
- NiagaraST: A Research Data Stream Management System at Portland State University
- Processing Flows of Information: From Data Stream to Complex Event Processing - Survey article on Data Stream and Complex Event Processing Systems