David Er-El

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1.1 Introduction To place ParPar 1. in context, we must rst review the diierent modes of operation common on clusters. Probably the most common approach is to view the cluster as a Network Of Workstations (NOW). With this approach, each node is owned by a certain individual, and is usually also physically located in his work area. The owner uses his(More)
The ParPar system is a high-performance cluster environment supporting a multiuser parallel workload. Its design follows a master-nodes structure, where the master controls all aspects of system activity using a dedicated control network. As nearly all control messages are multicast to a set of nodes, we implemented a reliable multicast protocol for this(More)
We design and analyze communication algorithms for an optical switch based on the electroholographic effect, that provides capabilities for configuration changes and a limited multicast. As configuration changes incur a high overhead, we suggest the use of a high-speed forwarding unit as part of the network interface. We develop broadcast algorithms that(More)
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