SCHEDULE: NOV 12-18, 2011

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Optimized Pre-Copy Live Migration for Memory Intensive Applications

SESSION: Storage and Memory

EVENT TYPE: Paper

TIME: 11:30AM - 12:00PM

AUTHOR(S):Khaled Z. Ibrahim, Costin Iancu, Steven Hofmeyr, Eric Roman

ROOM:TCC 305

ABSTRACT:
Live migration is a widely used technique for resource consolidation and fault tolerance. KVM and Xen use iterative pre-copy approaches which work well in practice for commercial applications. In this paper, we study pre-copy live migration of MPI and OpenMP scientific applications running on KVM and present a detailed performance analysis of the migration process. We show that due to a high rate of memory changes, the current KVM rate control and target downtime heuristics do not cope well with HPC applications: statically choosing rate limits and downtimes is infeasible and current mechanisms sometimes provide sub-optimal performance. We present a novel on-line algorithm able to provide minimal downtime and minimal impact on end-to-end application performance. At the core of this algorithm is controlling migration based on the application memory rate of change.

Chair/Author Details:

Khaled Z. Ibrahim - Lawrence Berkeley National Laboratory

Costin Iancu - Lawrence Berkeley National Laboratory

Steven Hofmeyr - Lawrence Berkeley National Laboratory

Eric Roman - Lawrence Berkeley National Laboratory

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The full paper can be found in the ACM Digital Library