Communications method involving groups of processors of a distri

Details Communications method involving groups of processors of a distri Communications method involving groups of processors of a distri

1996-04-30

1998-08-04

Treat, William M.

39520031, 395676, G06F 1100

Patent

active

057907722

ABSTRACT:
In a distributed computing environment having a plurality of groups of processors, each processor group maintains its own set of ordered messages. A message is sent to a group of processors. In particular, a request to multicast a message is sent to a leader of the group of processors, i.e., a group leader, and the group leader assigns a sequence number to the message to be sent, thereby providing an ordered message. Then, the group leader multicasts the ordered message to the group of processors. When the processors of the group receive the ordered message, each determines whether the message is in proper sequence order. If the message is out of order for a particular processor indicating that a message has been missed, then that particular processor requests the missing message from a processor within the group.

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Kenneth P. Birman, "The Process Group Approach to Reliable Distributed Computing," pp. 1-35 (Jul. 3, 1991).
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B. Oki, M. Pfluegl, A. Siegel and D. Skeen, "The Information Bus.RTM.--An Architecture for Extensible Distributed Systems," Teknekron Software Systems, Inc., Palo Alto, CA, pp. 58-68 (.COPYRGT.1993).
David Powell, "Group Communication," Communications of the ACM, vol. 39, No. 4, pp. 50-96 (Apr. 1996).

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