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Browsing by Author "Hameurlain, Abdelkader"
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Adaptive join operator for federated queries over linked data endpoints
Oğuz, Damla; Yin, Shaoyi; Hameurlain, Abdelkader; Ergenç, Belgin; Dikenelli, Oğuz (Springer, 2016)Traditional static query optimization is not adequate for query federation over linked data endpoints due to unpredictable data arrival rates and missing statistics. In this paper, we propose an adaptive join operator for ... -
Dynamic replication strategies in data grid systems: a survey
Tos, Uras; Mokadem, Riad; Hameurlain, Abdelkader; Ayav, Tolga; Bora, Şebnem (Springer, 2015-11)In data grid systems, data replication aims to increase availability, fault tolerance, load balancing and scalability while reducing bandwidth consumption, and job execution time. Several classification schemes for data ... -
Ensuring performance and provider profit through data replication in cloud systems
Tos, Uras; Mokadem, Riad; Hameurlain, Abdelkader; Ayav, Tolga; Bora, Şebnem (Springer, 2017-12-14)Cloud computing is a relatively recent computing paradigm that is often the answer for dealing with large amounts of data. Tenants expect the cloud providers to keep supplying an agreed upon quality of service, while cloud ... -
Extended adaptive join operator with bind-bloom join for federated SPARQL queries
Oğuz, Damla; Yin, Shaoyi; Ergenç, Belgin; Hameurlain, Abdelkader; Dikenelli, Oğuz (IGI Global, 2017-09)The goal of query optimization in query federation over linked data is to minimize the response time and the completion time. Communication time has the highest impact on them both. Static query optimization can end up ... -
Federated query processing on linked data: A qualitative survey and open challenges
Oğuz, Damla; Ergenç, Belgin; Yin, Shaoyi; Dikenelli, Oğuz; Hameurlain, Abdelkader (Cambridge University Press, 2015-08)A large number of data providers publish and connect their structured data on the Web as linked data. Thus, the Web of data becomes a global data space. In this paper, we initially give an overview of query processing ... -
Grid resource discovery based on web services
Çokuslu, Deniz; Hameurlain, Abdelkader; Erciyeş, Kayhan (IEEE, 2009)The size of grid systems has increased substantially in the last decades. Resource discovery in grid systems is a fundamental task which provides searching and locating necessary resources for a given process. Various ... -
A maximum degree self-stabilizing spanning tree algorithm
Çokuslu, Deniz; Erciyeş, Kayhan; Hameurlain, Abdelkader (Springer, 2010)Spanning trees are fundamental topological structures in distributed environments which ease many applications that require frequent communication between nodes. In this paper, we examine and compare two spanning tree ... -
Mobile join operators for restricted sources
Özakar, Belgin; Morvan, Franck; Hameurlain, Abdelkader (Hindawi Publishing, 2005)We consider the problem of query execution when there is limited access to the relations, i.e. when binding patterns require values to be specified in order to get data from the relation. This problem is common in virtual ... -
A performance and profit oriented data replication strategy for cloud systems
Tos, Uras; Mokadem, Riad; Hameurlain, Abdelkader; Ayav, Tolga; Bora, Şebnem (IEEE, 2017-01)In today's world, tenants of cloud systems expect timely responses to queries that process ever-increasing sizes of data. However, most cloud providers offer their services without any performance guarantees to their ... -
Resource allocation algorithm for a relational join operator in grid systems
Çokuslu, Deniz; Hameurlain, Abdelkader; Erciyeş, Kayhan; Morvan, Franck (Association for Computing Machinery, 2012)Grid systems become very popular during the last decade because of their rapidly increasing computational capabilities. On the other hand, the advances on different domains cause enormous increase in the scale of the ... -
Resource allocation for query processing in grid systems: A survey
Çokuslu, Deniz; Hameurlain, Abdelkader; Erciyeş, Kayhan (CRL Publishing, 2012-07)Grid systems are very useful platforms for distributed databases, especially in some situations in which the scale of data sources and user requests is very high. However, the main characteristics of grid systems such as ... -
Resource discovery in grid systems: A survey
Hameurlain, Abdelkader; Çokuslu, Deniz; Erciyeş, Kayhan (Inderscience Enterprises, 2010-07)Resource Discovery (RD) is one of the key issues in successful Grid systems. Yet, new methodologies for RD are constantly researched owing to the dynamicity, heterogeneity and large-scale characteristics of Grids. Recently, ... -
Robust placement of mobile relational operators for large scale distributed query optimization
Ergenç, Belgin; Morvan, Franck; Hameurlain, Abdelkader (IEEE, 2007)This paper presents a compile-time placement method of mobile relational operators MROs in a large scale environment. MROs are self adaptive to changing runtime conditions by deciding their execution place if they discover ...
