Network-Based Parallel Computing. Communication, by Brent N. Chun, David E. Culler (auth.), Babak Falsafi, Mario

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By Brent N. Chun, David E. Culler (auth.), Babak Falsafi, Mario Lauria (eds.)

This e-book constitutes the completely refereed post-workshop court cases of the 4th overseas Workshop on conversation, structure, and purposes for Network-Based Parallel Computing, CANPC 2000, held in Tolouse, France in January 2000. The 12 revised complete papers awarded have been rigorously reviewed and chosen for inclusion within the e-book. The papers are prepared in sections on software improvement and execution help, community router structure, method aid for communique abstractions, and community software program and interface structure.

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This capability, and that of returning the requested information from all processes is achieved by implementing a ‘false barrier’ which allows information to pass from the graphical interface through process zero to the other processes. In order to do this, the debugging library registers a variable called barrier command at the beginning of the program (in db bsp begin). When db bsp sync is called, all the processes enter a loop in which process zero awaits commands from the graphical interface, before copying them into barrier command on all the other processes.

Moreover, using the same techniques, this layer can also support the dynamic adaptation of the application to changing underlying resource characteristics. For instance, upon detecting that the network connection after migration is slow, the layer can transparently introduce compression and decompression steps at the two ends of the connection, thereby trading off additional processing for network bandwidth. Thus, this layer provides a natural place for incorporating several policies for customizing application use of underlying resources.

A. Wilson: A Visual Debugger for BSPlib. Oxford University MSc thesis, 1999. 11. MPI: A message passing interface in Proc. Supercomputing ’93, IEEE Computer Society, Message Passing Interface Forum series, pp878-883, (1993) 12. edu/pdsg Abstract. This paper presents the design, implementation, and performance of a transparent network connectivity layer for dynamic cluster environments. Our design uses the techniques of API interception and virtualization to construct a transparent layer in user space; use of the layer requires no modification either to the application or the underlying operating system and messaging layers.

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