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Hypervisor-assisted application checkpointing in virtualized environments

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5 Author(s)
Min Lee ; Georgia Inst. of Technol., Atlanta, GA, USA ; Krishnakumar, A.S. ; Krishnan, P. ; Singh, N.
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There are two broad categories of approaches used for checkpointing: application-transparent and application-assisted. Typically, application-assisted approaches provide a more flexible and light-weight mechanism but require changes to the application. Although most applications run well under virtualization (e.g. Xen which is being adopted widely), the addition of application-assisted checkpointing - used for high availability - causes performance problems. This is due to the overhead of key system calls used by the checkpointing techniques under virtualization. To overcome this, we introduce the notion of hypervisor-assisted application checkpointing with no changes to the guest operating system. We present the design and a Xen-based implementation of our family of application checkpointing techniques. Our experiments show performance improvements of 4× to 13× in the primitives used for supporting high availability compared to purely user-level approaches.

Published in:

Dependable Systems & Networks (DSN), 2011 IEEE/IFIP 41st International Conference on

Date of Conference:

27-30 June 2011

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