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Clouder : a flexible large scale decentralized object store
Vilaça, Ricardo Manuel PereiraPrograma Doutoral em Informática MAP-i ; Large scale data stores have been initially introduced to support a few concrete extreme scale applications such as social networks. Their scalability and availability requirements often outweigh sacrificing richer data and processing models, and even elementary data consistency. In strong contrast with traditional relational databases (RDBMS), large scale data stores p...
An epidemic approach to dependable key-value substrates
Matos, Miguel; Vilaça, Ricardo; Pereira, José, 1973-; Oliveira, Rui Carlos Mendes deThe sheer volumes of data handled by today's Internet services demand uncompromising scalability from the persistence substrates. Such demands have been successfully addressed by highly decentralized key-value stores invariably governed by a distributed hash table. The availability of these structured overlays rests on the assumption of a moderately stable environment. However, as scale grows with unprecedented...
A correlation-aware data placement strategy for key-value stores
Vilaça, Ricardo; Oliveira, Rui Carlos Mendes de; Pereira, José, 1973-Key-value stores hold the unprecedented bulk of the data produced by applications such as social networks. Their scalability and availability requirements often outweigh sacri cing richer data and pro- cessing models, and even elementary data consistency. Moreover, existing key-value stores have only random or order based placement strategies. In this paper we exploit arbitrary data relations easily expressed b...
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