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USENIX
2008
15 years 2 days ago
A Multi-Site Virtual Cluster System for Wide Area Networks
A virtual cluster is a promising technology for reducing management costs and improving capacity utilization in datacenters and computer centers. However, recent cluster virtualiz...
Takahiro Hirofuchi, Takeshi Yokoi, Tadashi Ebara, ...
ECAI
2004
Springer
15 years 1 months ago
Many Hands Make Light Work: Localized Satisfiability for Multi-Context Systems
In this paper, we tackle the satisfiability problem for multi-context systems. First, we establish a satisfiability algorithm based on an encoding into propositional logic. Then, w...
Floris Roelofsen, Luciano Serafini, Alessandro Cim...
EDBT
2004
ACM
145views Database» more  EDBT 2004»
15 years 10 months ago
CUBE File: A File Structure for Hierarchically Clustered OLAP Cubes
Abstract. Hierarchical clustering has been proved an effective means for physically organizing large fact tables since it reduces significantly the I/O cost during ad hoc OLAP quer...
Nikos Karayannidis, Timos K. Sellis, Yannis Kouvar...
ICTAI
2006
IEEE
15 years 3 months ago
Intelligent Neighborhood Exploration in Local Search Heuristics
Standard tabu search methods are based on the complete exploration of current solution neighborhood. However, for some problems with very large neighborhood or time-consuming eval...
Isabelle Devarenne, Hakim Mabed, Alexandre Caminad...
DOLAP
2003
ACM
15 years 3 months ago
Exploiting hierarchical clustering in evaluating multidimensional aggregation queries
Multidimensional aggregation queries constitute the single most important class of queries for data warehousing applications and decision support systems. The bottleneck in the ev...
Dimitri Theodoratos