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Departments >> Faculty of Engineering >> Department of Computer Science >> Chair of Computer Science 6 (Data Management) >>
i6sdb - stream and data bases

Current database systems process their data in a transactional way. Important data can be saved both persistently and consistently. The success of database systems is based on the concept of transaction, the neutrality of application, and the structured query language SQL. In recent years data transmission became cheaper; so less important and continuously occurring data like server logs, system events and sensor measurements could be transmitted and evaluated by gathering useful aggregated data. This kind of data is often useful, if it is processed realtime.

As the sequence of data has a data scheme similar to tuples of databases, common operators and query languages have been developed for data streams. First data stream management systems (DSMS) have been implemented. The main difference between database processing and data stream processing is the nonexistence of persisted data items. DSMSs save queries instead of data items; the user data is transient.

At the moment two aspects of the research area of data streams are focused. First, properties and requirements are gathered that helps coupling data sources with DSMSs in an elegant and high-performance way. Second, application areas as medicine, SW/HW monitoring etc. are explored.

Project manager:
Prof. i. R. Dr. Klaus Meyer-Wegener

Project participants:
Dr.-Ing. Michael Daum, Dipl.-Inf. Frank Lauterwald

Datenströme; DSMS; Kostenmodelle; Anfrageverarbeitung; Performance

Duration: 1.1.2006 - 31.3.2014

Lauterwald, Frank
E-Mail: frank.lauterwald@fau.de
Lindner, Wolfgang ; Meyer-Wegener, Klaus ; Velke, Holger: Data Stream Query Optimization Across System Boundaries of Server and Sensor Network. In: IEEE Computer Society (Org.) : Mobile Data Management (MDM 2006, Proc. 7th International Conference Nara, Japan May 9-13, 2006). Los Alamitos, CA : IEEE CS Press, 2006, pp 25. - ISBN 0-7695-2526-1
Lindner, Wolfgang ; Meyer-Wegener, Klaus ; Velke, Holger: Operator Allocation in Borealis with Integrated Sensor Network Query Processors. In: Nittel, Silvia ; Kulik, Lars ; Tanin, Egemen (Ed.) : Mobile Location-Aware Sensor Networks (Workshop in conjunction with MDM 2006 Nara, Japan May 13, 2006). Los Alamitos, CA : IEEE CS Press, 2006, pp 155. - ISBN 0-7695-2526-1
Daum, Michael: Abstract Query Language: Global Queries in Heterogeneous and Distributed Stream Processing Systems. Erlangen : Friedrich-Alexander-Universität. 2009 (CS6-2009-1). - Internal report. 25 pages
Daum, Michael: Deployment of Global Queries in Distributed and Heterogeneous Stream Processing Systems. In: Hinze, Annika ; Pietzuch, Peter (Ed.) : DEBS PhD Workshops (International Conference on Distributed Event-Based Systems Nashville, TN, USA July 6th-9th, 2009,). 2009, pp 1-5.
Daum, Michael ; Fischer, Martin ; Kiefer, Mario ; Meyer-Wegener, Klaus: Integration of Heterogeneous Sensor Nodes by Data Stream Management. In: N.N. (Ed.) : Proc. 10th Int. Conf. on Mobile Data Management (MDM'09 Taipei, Taiwan May 18-20, 2009). Los Alamitos, California - Washington - Tokyo : IEEE Computer Society Conference Publishing Services (CPS), 2009, pp 525-530. - ISBN 978-0-7695-3650-7
Dressler, Falko ; Kapitza, Rüdiger ; Daum, Michael ; Strübe, Moritz ; Schröder-Preikschat, Wolfgang ; German, Reinhard ; Meyer-Wegener, Klaus: Query Processing and System-Level Support for Runtime-Adaptive Sensor Networks. In: Geihs, Kurt ; David, Klaus (Ed.) : Proc. of 16. GI/ITG Fachtagung Kommunikation in Verteilten Systemen ((KiVS 2009) Kassel, Germany March 2009). 2009, pp 55-66.
Daum, Michael ; Lauterwald, Frank ; Baumgärtel, Philipp ; Meyer-Wegener, Klaus: Propagation of Densities of Streaming Data within Query Graphs. In: Gertz, Michael ; Ludäscher, Bertram (Ed.) : Scientific and Statistical Database Management: 22nd International Conference (SSDBM Heidelberg 30.06.-02.07.2010). 1st. Edition Heidelberg : Springer, 2010, pp 584-601. - ISBN 978-3-642-13817-1
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