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・ Data signaling rate
・ Data Sitchinava
・ Data Smog
・ Data source
・ Data source name
・ Data steward
・ Data storage
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・ Data Storage Institute
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・ Data Storage Technology
・ Data store
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Data stream management system
・ Data stream mining
・ Data striping
・ Data strobe encoding
・ Data structure
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・ Data structure diagram
・ Data synchronization
・ Data system
・ Data systems technician
・ Data terminal equipment
・ Data Terminal Ready
・ Data theft
・ Data thinking
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Data stream management system : ウィキペディア英語版
Data stream management system

A Data stream management system (DSMS) is a computer program to manage continuous data streams. It is similar to a database management system (DBMS), which is, however, designed for static data in conventional databases. A DSMS also offers a flexible query processing so that the information need can be expressed using queries. However, in contrast to a DBMS, a DSMS executes a ''continuous query'' that is not only performed once, but is permanently installed. Therefore, the query is continuously executed until it is explicitly uninstalled. Since most DSMS are data-driven, a continuous query produces new results as long as new data arrive at the system. This basic concept is similar to Complex event processing so that both technologies are partially coalescing.
== Functional principle ==

One of the most important features of a DSMS is the possibility to handle potentially infinite and rapidly changing data streams by offering flexible processing at the same time, although there are only limited resources like a limited main memory. The following table provides various principles of DSMS and compares them to traditional DBMS.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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