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[16 May 2017] A bachelor student at RTSLAB was awarded the best thesis award from IDA - Tim Hultman. more ...

[12 May 2016] A master student at RTSLAB was awarded the best thesis award from IDA - Alexander Alesand. more ...

[12 May 2016] A bachelor student at RTSLAB was awarded the best thesis award from IDA - Mathias Almquist and Viktor Almquist. more ...

[25 May 2015] A master student at RTSLAB was awarded the best thesis award from IDA - Klervie Toczé. more ...

[26 May 2014] A bachelor student at RTSLAB was awarded the best thesis award from IDA - Simon Andersson. more ...

[31 May 2012] A masters student at RTSLAB was awarded the best thesis award from IDA - Ulf Magnusson. more ...

[27 February 2008] A masters student at RTSLAB was awarded the best thesis award from IDA - Johan Sigholm. more ...

[03 March 2004] A masters student at RTSLAB was awarded the best thesis award from IDA - Tobias Chyssler. more ...

[01 Jul 2003] For second year in a row a masters student at RTSLAB was awarded the best thesis award from SNART - Mehdi Amirijoo. more ...

Master Thesis - Past Projects - Abstract

Adaptive Checkpointing for Emergency Communication Systems

ID: LIU-IDA/LITH-EX-G--16/060?SE

The purpose of an emergency communication system is to be ready andavailable at all times during an emergency situation. This means that emergencysystems have specic usage characteristics, they experience long idleperiods followed by usage spikes. To achieve high availability it is importantto have a fault-tolerant solution. In this report, warm passive replication isin focus. When using warm passive replication, checkpointing is the procedureof transfering the current state from a primary server to its replicas. Inorder to utilize resources in a more eective manner compared to when usinga xed interval checkpointing method an adaptive checkpointing method isproposed. A simulation-based comparison is carried out using MATLABand Simulink to test both the proposed adaptive method and the xed intervalmethod. Two metrics, response time and time to recover, and fourparameters are used in the simulation. The results show that an adaptivemethod can increase eciency, but in order to make a good adaptive methodit is necessary to have specic information regarding system congurationand usage characteristics.

Keywords: checkpoint, adaptive, passive, replication

File: Click here to download/view the thesis

Author(s): Christoffer Nilsson and Sebastian Karlsson

Contact: Mikael Asplund

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