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DASFAA
2003
IEEE

Scalable View Expansion in a Peer Mediator System

9 years 8 months ago
Scalable View Expansion in a Peer Mediator System
To integrate many data sources we use a peer mediator framework where views defined in the peers are logically composed in terms of each other. A common approach to execute queries over mediators is to treat views in data sources as ’black boxes’. The mediators locally decompose queries into query fragments and submit them to the data sources for processing. Another approach, used in distributed DBMSs, is to treat the views as ’transparent boxes’ by importing and fully expanding all views and merge them with the query. The black box approach often leads to inefficient query plans. However, in a peer mediator framework full view expansion (VE) leads to prohibitively long query compilation times when many peers are involved. It also limits peer autonomy since peers must reveal their view definitions. We investigate in a peer mediator framework the tradeoffs between none, partial, and full VE in two different distributed view composition scenarios. We show that it is often favo...
Timour Katchaounov, Vanja Josifovski, Tore Risch
Added 04 Jul 2010
Updated 04 Jul 2010
Type Conference
Year 2003
Where DASFAA
Authors Timour Katchaounov, Vanja Josifovski, Tore Risch
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