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Customizable parall...
Customizable parallel execution of scientific stream queries
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- Ivanova, Milena (author)
- Uppsala universitet,Institutionen för informationsteknologi,Datalogi,UDBL
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- Risch, Tore (author)
- Uppsala universitet,Institutionen för informationsteknologi,Datalogi,UDBL
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(creator_code:org_t)
- 2005
- 2005
- English.
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In: 31st International Conference on Very Large Data Bases.
- Related links:
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http://www.vldb2005....
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Scientific applications require processing high-volume on-line streams of numerical data from instruments and simulations. We present an extensible stream database system that allows scalable and flexible continuous queries on such streams. Application dependent streams and query functions are defined through an object-relational model. Distributed execution plans for continuous queries are described as high-level data flow distribution templates. Using a generic template we define two partitioning strategies for scalable parallel execution of expensive stream queries: window split and window distribute. Window split provides operators for parallel execution of query functions by reducing the size of stream data units using application dependent functions as parameters. By contrast, window distribute provides operators for customized distribution of entire data units without reducing their size. We evaluate these strategies for a typical high volume scientific stream application and show that window split is favorable when expensive queries are executed on limited resources, while window distribution is better otherwise.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
Keyword
- Databases
- Databaser
Publication and Content Type
- ref (subject category)
- kon (subject category)
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