“The performance of the xAMP protocol on Token-Bus and FDDI NAC's”

From Navigators

Jump to: navigation, search

Paulo Veríssimo, José Rufino, Henrique Fonseca, Luís Rodrigues

INESC, Tech. Rep. RT/101-91, Nov. 1991.

Abstract: There is an increasing number of distributed applications, some of them fault-tolerant, and it has been recognized that its construction may benefit from the existence of reliable broadcast protocols. Some systems are clock-driven, exhibiting tight synchrony: they rely on clock synchronization and space redundancy. Others, like the xAMp, an atomic multicast protocol for local area networks, are clock-less. This work deals with the performance implications of supporting soft real-time distributed applications, with clock-less reliable broadcast protocols. In particular it analyses the performance of the lower layers of the Delta-4 communication system, i.e. it studies the time domain behaviour of both Abstract Network and xAMp components. Throughout this report we will develop a generic model that allow us to predict protocol execution times in any architecture. Case studies concerning protocol execution on two target LANs - the 10Mbps Token-Bus and the 100 Mbps FDDI - will be presented, showing how protocol performance scales with the utilization of high-speed networks. Additionally a set of guidelines concerning the dimensioning of xAMp timers and performance optimizations, useful for both system configuration implementation, are presented.

Download paper

Download The performance of the xAMP protocol on Token-Bus and FDDI NAC's

Export citation


Project(s): Project:Delta-4

Research line(s): Timeliness and Adaptation in Dependable Systems (TADS)

Personal tools
Navigators toolbox