Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Data Stream

  • Lukasz Golab
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_113

Synonyms

Continuous data feed

Definition

A data stream S is an ordered collection of data items, s 1, s 2, , having the following properties:
  • Data items are continuously generated by one or more sources and sent to one or more processing entities.

  • The arrival order of data items cannot be controlled by the processing entities.

For instance, an Internet Service Provider (ISP) may be interested in monitoring the traffic on one or more of its links. In this case, the data stream consists of data packets flowing through the network. The processing entities, e.g., monitoring software, may be located directly on routers inside the ISP’s network or on remote nodes.

Data streams may be classified into two types: based and derived. A base stream arrives directly from the source. A derived stream is a pre-processed base stream, e.g., an intermediate result of a query or a sub-query over one or more base streams. In the network monitoring scenario, the base stream corresponds to the actual IP...

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Recommended Reading

  1. 1.
    Babcock B, Babu S, Datar M, Motwani R, Widom J. Models and issues in data streams. In: Proceedings of the 21st ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems; 2002. p. 1–16.Google Scholar
  2. 2.
    Golab L, Özsu MT. Issues in data stream management. ACM SIGMOD Rec. 2003;32(2):5–14.CrossRefGoogle Scholar
  3. 3.
    Muthukrishnan S. Data streams: algorithms and applications. Found Trends Theor Comput Sci. 2005;1(2):1–67.CrossRefMathSciNetzbMATHGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.University of WaterlooWaterlooCanada

Section editors and affiliations

  • Ugur Cetintemel
    • 1
  1. 1.Department of Computer ScienceBrown UniversityProvidenceUSA