Oracle International Corporation

Sun Microsystems, Inc.

Stephen McKinty

Predrag Hodoba

Bjorn Dag Johnsen

Bjørn Dag Johnsen

Francois Armand

Didier Poirot

Systems and methods for multicast send duplication instead of replication in a high performance computing environment. A method can provide a plurality of switches, a plurality of hosts, the plurality of hosts being interconnected via the plurality of switches, wherein a host of the plurality of hosts comprises a multicast sender node, the sender node comprising a system image generation module and a current message sequence module. The method can organize the plurality of switches into two rails, the two or more rails providing redundant connectivity between the plurality of hosts. The method can send two or more duplicate multicast packets on different rails. Upon a receiving node receiving at least two versions of the same multicast packet, only one will be delivered to the communication stack/clients above the layer that handles the encapsulation header.

System and method for a multicast send duplication instead of replication in a high performance computing environment

One embodiment of the present invention provides a distributed computer system comprising a group of nodes, said group of nodes having a first and a second node adapted to act as current monitor nodes, each node of the group of nodes having an identifier and a management layer being informed which node currently acts as the current monitor node. The first and second node each include a protocol server adapted to associate and to send an address to a node requesting an address in the group of nodes, and a memory adapted to store an association address-identifier of a node requesting an address. The protocol server is further capable of requesting the management layer of a node for an indication informing if said node acts as the current monitor node, and attributing, to the current monitor node, the ownership of a list of associations, said list comprising associations of the memory.

Distributed computer system enhancing a protocol service to a highly available service

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Theys, France

Stephen McKinty