dc.contributor.advisor | Helvik, Bjarne Emil | nb_NO |
dc.contributor.author | Sæstad, Ane | nb_NO |
dc.date.accessioned | 2014-12-19T14:12:17Z | |
dc.date.available | 2014-12-19T14:12:17Z | |
dc.date.created | 2010-09-03 | nb_NO |
dc.date.issued | 2008 | nb_NO |
dc.identifier | 347611 | nb_NO |
dc.identifier | ntnudaim:4113 | nb_NO |
dc.identifier.uri | http://hdl.handle.net/11250/261734 | |
dc.description.abstract | In the later years, fault tolerant distributed systems have been applied to a variety of network internal and external services. Keeping distributed systems consistent and fault tolerant require management functionality. Jgroup/ARM is a java based prototype system which automates this management functionality for fault tolerant distributed systems. This thesis presents an evaluation of the dependability characteristics of the Jgroup/ARM system. Both static and dynamic modelling techniques are introduced, but the main focus is on the dynamic techniques; state-diagrams and Petri net models. Previous work is evaluated to nd an approach suitable for dependability modelling of Jgroup/ARM. A system delivery model for Jgroup/ARM is developed based on its functionality. The monitored subsystem is dened to include the hardware (processors), a given number of services in the system and the replication management functionality (ARM framework). A Petri net model of Jgroup/ARM is developed in the Möbius modelling tool based on the system delivery model. A model of a single service replicated on a cluster of processors is developed, analyzed and expanded to include multiple services and the ARM framework functionality. The dependability of Jgroup/ARM is evaluated through simulating example scenarios in Möbius. The results show that the system availability is very high, even with a relatively high failure rate. | nb_NO |
dc.language | eng | nb_NO |
dc.publisher | Institutt for telematikk | nb_NO |
dc.subject | ntnudaim | no_NO |
dc.subject | SIE7 kommunikasjonsteknologi | no_NO |
dc.subject | Telematikk | no_NO |
dc.title | Dependability modelling of Jgroup/ARM | nb_NO |
dc.type | Master thesis | nb_NO |
dc.source.pagenumber | 169 | nb_NO |
dc.contributor.department | Norges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for telematikk | nb_NO |