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Live Replication of Virtualized VoIP Servers

Authors:
Jiri Hlavacek
Robert Bestak

Keywords: VoIP; system availability; virtualization; live replication.

Abstract:
Virtualization technology enables resource sharing and it can also improve system availability thanks to the continuous real-time migration mechanism. Highly available Internet Protocol communication systems are still expensive as there is no standard solution and customized software development is lengthy and expensive. In this paper, we analyze the continuous live replication mechanism of Xen hypervisor in the context of virtual machine hosting a Voice over Internet Protocol server processing both signalization and user data. We demonstrate that, nowadays, replication mechanism is unsuitable for soft real-time applications. The main drawbacks are jitter and packet bursts generated by the replication mechanism output buffering. To eliminate this, we propose to classify output packets and to let packets with real-time data bypass the buffering. The results obtained confirm that the soft real-time application’s availability can be significantly improved by using virtual machine’s live replication.

Pages: 277 to 282

Copyright: Copyright (c) IARIA, 2013

Publication date: July 21, 2013

Published in: conference

ISSN: 2308-4529

ISBN: 978-1-61208-283-7

Location: Nice, France

Dates: from July 21, 2013 to July 26, 2013