Pascal Felber

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Well adapted to the loosely coupled nature of distributed interaction in large-scale applications, the publish/subscribe communication paradigm has recently received increasing attention. With systems based on the publish/subscribe interaction scheme, subscribers register their interest in an event, or a pattern of events, and are subsequently(More)
The current generation of software transactional memories has the advantage of being simple and efficient. Nevertheless, there are several parameters that affect the performance of a transactional memory, for example the locality of the application and the cache line size of the processor. In this paper, we investigate dynamic tuning mechanisms on a new(More)
The publish/subscribe paradigm is a popular model for allowing publishers (i.e., data generators) to selectively disseminate data to a large number of widely dispersed subscribers (i.e., data consumers) who have registered their interest in specific information items. Early publish/subscribe systems have typically relied on simple subscription mechanisms,(More)
Popular content such as software updates is requested by a large number of users. Traditionally, to satisfy a large number of requests, lager server farms or mirroring are used, both of which are expensive. An inexpensive alternative are peer-to-peer based replication systems, where users who retrieve the file, act simultaneously as clients and servers. In(More)
Structured peer-to-peer (P2P) lookup services—such as Chord, CAN, Pastry and Tapestry—organize peers into a flat overlay network and offer distributed hash table (DHT) functionality. In these systems, data is associated with keys and each peer is responsible for a subset of the keys. We study hierarchical DHTs, in which peers are organized into groups, and(More)
In this paper we present a complete Java STM framework, called Deuce, intended as a platform for developing scalable concurrent applications and as a research tool for designing new STM algorithms. It was not clear if one could build an e cient Java STM without compiler support. Deuce provides several bene ts over existing Java STM frameworks: it avoids any(More)
Time-based transactional memories use time to reason about the consistency of data accessed by transactions and about the order in which transactions commit. They avoid the large read overhead of transactional memories that always check consistency when a new object is accessed, while still guaranteeing consistency at all times--in contrast to transactional(More)