Implementing Virtual Machine Replication: A Case Study using Xen and KVM

Virtual machine (VM) replication has been recognized as an inexpensive way of providing high availability on commodity hardware. Unfortunately, its impact on system performance is far from negligible and strategies have been proposed to mitigate this problem. In this paper we take a look at VM replication from a different perspective: the choice of a hypervisor. Namely, the differences between hypervisors in terms of architecture and performance are well known and studied in the literature, but no analysis has been performed so far in the context of replication. Taking open-source hypervisors Xen and KVM as examples, we show what hypervisor services are necessary to implement a primary-backup replication scheme and how hypervisor design affects the development steps and the performance. Interestingly, our userspace implementation on top of KVM achieves roughly the same performance as an already existing, more mature Xen implementation, which leads us to the conclusion that the inherent cost of the replication scheme dominates the differences between the chosen hypervisors.


Published in:
2012 Ieee 26Th International Conference On Advanced Information Networking And Applications (Aina), 73-80
Presented at:
26th IEEE International Conference on Advanced Information Networking and Applications (AINA-2012), Fukuoka Institute of Technology (FIT), Fukuoka, Japan, March 26-29, 2012
Year:
2012
Publisher:
New York, IEEE Computer Society Press
ISSN:
1550-445X
ISBN:
978-0-7695-4651-3
Keywords:
Laboratories:




 Record created 2012-04-04, last modified 2018-03-17


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