Sciweavers

1007 search results - page 1 / 202
» Worst-Case Optimal Algorithms for Parallel Query Processing
Sort
View
DAGSTUHL
2004
13 years 6 months ago
The Priority R-Tree: A Practically Efficient and Worst-Case-Optimal R-Tree
We present the Priority R-tree, or PR-tree, which is the first R-tree variant that always answers a window query using O((N/B)1-1/d + T/B) I/Os, where N is the number of ddimensio...
Lars Arge, Mark de Berg, Herman J. Haverkort, Ke Y...
INFOCOM
2000
IEEE
13 years 9 months ago
Near Optimal Routing Lookups with Bounded Worst Case Performance
Abstract—The problem of route address lookup has received much attention recently and several algorithms and data structures for performing address lookups at high speeds have be...
Pankaj Gupta, Balaji Prabhakar, Stephen P. Boyd
STACS
2005
Springer
13 years 10 months ago
Worst-Case and Average-Case Approximations by Simple Randomized Search Heuristics
Abstract. In recent years, probabilistic analyses of algorithms have received increasing attention. Despite results on the average-case complexity and smoothed complexity of exact ...
Carsten Witt
VLDB
1994
ACM
153views Database» more  VLDB 1994»
13 years 8 months ago
Optimization Algorithms for Exploiting the Parallelism-Communication Tradeoff in Pipelined Parallelism
We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering followed by parallelization. We focus on the parallelization phase a...
Waqar Hasan, Rajeev Motwani
WADS
2007
Springer
131views Algorithms» more  WADS 2007»
13 years 10 months ago
On the Robustness of Graham's Algorithm for Online Scheduling
While standard parallel machine scheduling is concerned with good assignments of jobs to machines, we aim to understand how the quality of an assignment is affected if the jobs’...
Michael Gatto, Peter Widmayer