589 search results - page 45 / 118 » Optimized Query Evaluation Using Cooperative Sorts |
MST
1998
14 years 9 months ago
1998
We have developed a methodology for predicting the performance of parallel algorithms on real parallel machines. The methodology consists of two steps. First, we characterize a mac...
PVM
2005
Springer
15 years 3 months ago
2005
Springer
Many large-scale production parallel programs often run for a very long time and require data checkpoint periodically to save the state of the computation for program restart and/o...
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
This paper introduces U-relations, a succinct and purely relational representation system for uncertain databases. U-relations support attribute-level uncertainty using vertical pa...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
As a simple XML query language but with enough expressive power, XPath has become very popular. To expedite evaluation of XPath queries, we consider the problem of rewriting XPath...
ICDT
2005
ACM
15 years 3 months ago
2005
ACM
d abstract) Foto Afrati1 and Rada Chirkova2 1 Electrical and Computing Eng., National Technical University of Athens, 157 73 Athens, Greece 2 Computer Science Department, North Car...