197 research outputs found
Performance Evaluation of JXTA Communication layers
The main goal of Project JXTA is to provide a peer-to-peer application framework based on a standard set of generic peer-to-peer protocols, independent of any particular platform or language. In spite of its recent popularity, the performance characteristics of the communication layers of JXTA are not well understood, though there is a general sentiment of inadequate performance. This paper examines the performance of the three JXTA communication layers: the JXTA sockets, JXTA pipe service and JXTA endpoint service. Round-trip time benchmarks are performed to evaluate the bandwidth and latency of each of the communication layers over both a Fast-Ethernet and a Myrinet network using the Java implementation of the JXTA protocols. The results show that, although the JXTA communications exhibit high latency, the Java binding of JXTA is able to reach the throughput of Java sockets. Very interesting results were obtained for benchmarks performed on high-performance Myrinet networks, where two out of the three JXTA communication layers were still able to achieve throughputs in excess of 1 Gb/s
An Efficient Transport Protocol for delivery of Multimedia An Efficient Transport Protocol for delivery of Multimedia Content in Wireless Grids
A grid computing system is designed for solving complicated scientific and
commercial problems effectively,whereas mobile computing is a traditional
distributed system having computing capability with mobility and adopting
wireless communications. Media and Entertainment fields can take advantage from
both paradigms by applying its usage in gaming applications and multimedia data
management. Multimedia data has to be stored and retrieved in an efficient and
effective manner to put it in use. In this paper, we proposed an application
layer protocol for delivery of multimedia data in wireless girds i.e.
multimedia grid protocol (MMGP). To make streaming efficient a new video
compression algorithm called dWave is designed and embedded in the proposed
protocol. This protocol will provide faster, reliable access and render an
imperceptible QoS in delivering multimedia in wireless grid environment and
tackles the challenging issues such as i) intermittent connectivity, ii) device
heterogeneity, iii) weak security and iv) device mobility.Comment: 20 pages, 15 figures, Peer Reviewed Journa
Enabling JXTA for High Performance Grid Computing
Grid computing has recently emerged as a response to the growing demand for resources (processing power, storage, etc.) exhibited by scientific applications. However, as grid sizes increase, the need for self-organization and dynamic reconfigurations is becoming more and more important. Since such properties are exhibited by P2P systems, the convergence of grid computing and P2P computing seems natural. However, using P2P systems (usually running on the Internet) on a grid infrastructure (generally available as a federation of SAN-based clusters interconnected by high-bandwidth WANs) may raise the issue of the adequacy of the P2P communication mechanisms. This paper evaluates the communication performance of the JXTA P2P library over SANs and WANs, for both J2SE and C bindings. We analyze these results and we evaluate solutions able to improve the performance of JXTA on such grid infrastructures
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