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SUMMARY:Distributed skyline query processing
DTSTART:20090514T110000
DTSTAMP:20260408T052352Z
UID:d4c39d658119e76258a12be02f2f9afaa5817047a7305155b7721b13
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr. Akrivi Vlachou\, Norwegian University of Science and Techn
 ology (NTNU)\nAbstract: Skyline queries have attracted much attention rece
 ntly\, mainly because they help users to make intelligent decisions over d
 ata that represent many conflicting criteria. A challenging problem is to 
 support skyline queries in distributed environments\, where data is scatte
 red over independent sources. First\, we investigate skyline query process
 ing over peer-to-peer (P2P) systems\, which emerge as a powerful model for
  searching vast amounts of data distributed over independent sources. Simi
 lar to the peer-to-peer file-sharing networks (eMule\, KaZaA)\, our approa
 ch relies on a super-peer architecture. In order to support query processi
 ng\, queries are first routed on the super-peer backbone and afterwards\, 
 if necessary\, they are forwarded to the peers with relevant data. Query p
 rocessing in P2P networks poses inherent challenges and demands non-tradit
 ional techniques due to the distribution of content and the lack of global
  knowledge. Our approach relies on routing information at super-peer level
  in a deliberate way\, aiming at minimizing contacted peers and transferre
 d data. Then\, we study efficient skyline processing assuming a different 
 distributed environment\, namely a parallel shared-nothing architecture. T
 he main difference from peer-to-peer systems is that we do not aim to mini
 mize the number of contacted peers\, but minimize the total response time 
 by distributing evenly the workload among all participating servers. Final
 ly\, we discuss the case of a mobile environment\, where the bandwidth con
 sumption should be minimized. \nShort Bio: Akrivi Vlachou is currently a p
 ost-doctoral researcher under an ERCIM “Alain Bensoussan” fellowship i
 n the database research group of Prof.Kjetil Nørvåg\, in NTNU\, Norway. 
 She recieved her PhD in 2008 entitled "Efficient Query Processing over Hig
 hly Distributed Data" from the Athens University of Economics and Business
  supervised by Prof.Michalis Vazirgiannis. She received her Master in "Adv
 anced Information Systems" and her Diploma in “Computer Science and Tele
 communications” from the Department of Computer Science\, University of 
 Athens in 2001 and 2003 respectively. Her research interests lie in query 
 processing and data management in large-scale distributed systems.
LOCATION:BC 129 https://plan.epfl.ch/?room==BC%20129
STATUS:CONFIRMED
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