Khaled Farj1
and Adel Smeda2
1
Faculty of Science, University of Al-Jabel Al-Gharbi, P.O. Box 64200, Gharian, Libya
2
Faculty of Accounting, University of Al-Jabel Al-Gharbi, Gharian, Libya
Assessing Web service systems performance and their dependability are crucial for the development of
today’s applications. Testing the performance and Fault Tolerance Mechanisms (FTMs) of composed
service components is hard to be measured at design time due to service instability is often caused by the
nature of the network conditions. Using a real internet environment for testing systems is difficult to set up
and control. We have introduced a fault injection toolkit that emulates a WAN within a LAN environment
between composed service components and offers full control over the emulated environment in addition to
the capability to inject network-related faults and application specific faults. The toolkit also generates
background workloads on the system under test so as to produce more realistic results. We describe an
experiment that has been performed to examine the impact of fault tolerance protocols deployed at a
service client by using our toolkit system.
KEYWORDS
Web Services, Fault Tolerance Methodologies, and Software Fault Injection & Composed Web service.
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