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Publication Citation: VM Leakage and Orphan Control in Open-Source Clouds

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Author(s): Christopher E. Dabrowski; Kevin L. Mills;
Title: VM Leakage and Orphan Control in Open-Source Clouds
Published: November 29, 2011
Abstract: Computer systems often exhibit degraded performance due to resource leakage caused by erroneous programming or malicious attacks, and computers can even crash in extreme cases of resource exhaustion. The advent of cloud computing provides increased opportunities to amplify such vulnerabilities, thus affecting a significant number of computer users. Using simulation, we demonstrate that cloud computing systems based on open-source code could be subjected to a simple malicious attack capable of degrading availability of virtual machines (VMs). We describe how the attack leads to VM leakage, causing orphaned VMs to accumulate over time, reducing the pool of resources available to users. We identify a set of orphan control processes needed in multiple cloud components, and we illustrate how such processes detect and eliminate orphaned VMs. We show that adding orphan control allows an open-source cloud to sustain a higher level of VM availability during malicious attacks. We also report how the overhead of implementing orphan control scales with attack intensity.
Proceedings: 3rd IEEE International Conference on Cloud Computing Technology and Science
Pages: pp. 554 - 559
Location: Athens, -1
Dates: November 29-December 2, 2011
Keywords: availability; cloud computing; modeling; reliability; scalable fault resilience techniques
Research Areas: Modeling
PDF version: PDF Document Click here to retrieve PDF version of paper (282KB)