Framework for testing the fault-tolerance of systems including OS and network aspects

Buchacker, K.; Sieh, Volkmar

doi:10.1109/hase.2001.966811

Cited by 23 publications

(19 citation statements)

References 12 publications

(11 reference statements)

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“…This includes tools for single-node systems, where the Linux kernel and applications run inside a single user-levelLinux process [2,3,18]. In [16], fault injection is performed using a software-implemented emulator of PC hardware.…”

Section: Related Workmentioning

confidence: 99%

“…The use of fault injection to test distributed systems [19,7,8,6] and leveraging virtualization for fault injection [2,3,18,16,9,12] have been presented in previous works. However, unique features of our work include: A) a comprehensive presentation of all aspects of a practical testing infrastructure, and B) ad etailed case study of the use of the infrastructure to validate a system with multiple advanced fault tolerance features.…”

Section: Introductionmentioning

confidence: 99%

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Using Virtualization to Validate Fault-Tolerant Distributed Systems

Hsu

Gallagher

et al. 2010

Informatics

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Asynchronous events and complexs ystem state distributed across independent nodes makee xposure and diagnosis of flaws in distributed systems a challenge. The difficulties are exacerbated when the goal is to validate fault tolerance mechanisms that are activated only by the occurrence of errors, which are, by nature, rare. Va lidation of fault tolerance mechanisms is often done by injecting faults that emulate the actual faults and ''stress''t he functionality of the resilience mechanisms. Va lidation campaigns lasting days and involving thousands of fault injections are often necessary.W ep resent an infrastructure that combines virtualization and software-implemented fault injection to automate validation campaigns and support the analysis of the behavior of a distributed system under test. Virtualization enables: 1) aflexible fault injector capable of emulating a wide variety of faults, and 2) am echanism for autonomously recovering faulty nodes so that the campaign can continue running on a target system that is fully functional. As ac ase study we use this infrastructure to validate a Byzantine-fault-tolerant cluster manager.O ver 1280 hours of fault injections yielded the exposure of 11 unique flaws in the cluster manager.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using Virtualization to Validate Fault-Tolerant Distributed Systems

Hsu

Gallagher

et al. 2010

Informatics

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“…Since the issues and problems in implementing a software injection tool at the operating system level as well as the technical details of UMLinux have been treated in [2,8,17] this tool presentation will concentrate on the user perspective of UMLinux. UMLinux has advantages over pure simulation and SWIFI tools or virtualization software, because it combines all three -simulation, SWIFI and virtualization.…”

Section: Advantages Of Umlinuxmentioning

confidence: 99%

“…The terms virtual or user mode (UM) will be used interchangeably when the simulated machine and operating system or processes running on this simulated machine are being referred to. [2] lists a number of available virtualization tools, including Bochs [19], SimOS [15], Simics TM [20], Plex86 [12], VMware TM [21], Virtual PC TM [5], User Mode Linux (UML) [7]. To be able to inject a variety of faults precisely at the targeted fault locations, it is necessary to know in detail, how the simulated hardware is implemented.…”

Section: Advantages Of Umlinuxmentioning

confidence: 99%

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UMLinux - A Versatile SWIFI Tool

Sieh

Buchacker

2002

Dependable Computing EDCC-4

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Abstract. This tool presentation describes UMLinux, a versatile framework for testing the behavior of networked machines running the Linux operating system in the presence of faults. UMLinux can inject a variety of faults into the hardware of simulated machines, such as faults in the computing core or peripheral devices of a machine or faults in the network connecting the machines. The system under test, which may include several machines, as well as the fault-and workload run on this system are configurable. UMLinux has a number of advantages over traditional SWIFI and simulation tools: speed, immunity of fault-injection and logging processes from the state of the machine into which the faults are injected and binary compatibility with real world data and programs.

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