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» Optimized Query Evaluation Using Cooperative Sorts
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EDBT
1998
ACM
155views Database» more  EDBT 1998»
15 years 2 months ago
Improving the Query Performance of High-Dimensional Index Structures by Bulk-Load Operations
Abstract. In this paper, we propose a new bulk-loading technique for high-dimensional indexes which represent an important component of multimedia database systems. Since it is ver...
Stefan Berchtold, Christian Böhm, Hans-Peter ...
SIGMOD
2011
ACM
276views Database» more  SIGMOD 2011»
14 years 18 days ago
Schedule optimization for data processing flows on the cloud
Scheduling data processing workflows (dataflows) on the cloud is a very complex and challenging task. It is essentially an optimization problem, very similar to query optimizati...
Herald Kllapi, Eva Sitaridi, Manolis M. Tsangaris,...
PODS
2009
ACM
130views Database» more  PODS 2009»
15 years 10 months ago
Secondary indexing in one dimension: beyond b-trees and bitmap indexes
Let be a finite, ordered alphabet, and consider a string x = x1x2 . . . xn n . A secondary index for x answers alphabet range queries of the form: Given a range [al, ar] , retu...
Rasmus Pagh, Srinivasa Rao Satti
CN
2010
136views more  CN 2010»
14 years 10 months ago
PCIR: Combining DHTs and peer clusters for efficient full-text P2P indexing
Distributed hash tables (DHTs) are very efficient for querying based on key lookups. However, building huge term indexes, as required for IR-style keyword search, poses a scalabil...
Odysseas Papapetrou, Wolf Siberski, Wolfgang Nejdl
JCDL
2004
ACM
106views Education» more  JCDL 2004»
15 years 3 months ago
Sharing encountered information: digital libraries get a social life
As part of a more extensive study of reading-related practices, we have explored how people share information they encounter in their everyday reading as a complement to the more ...
Catherine C. Marshall, Sara A. Bly