This article deals with the impact of virtualization
techniques on interactive delay-sensitive applications running in realtime,
particularly IP telephony. Many institutions, organizations and
home users often adopt the virtualized solutions for their safety, ease
of administration and backup. Virtualization, which was chiefly the
prerogative of companies and the academic world in its early days,
has gradually develop its platform to reach out to the ordinary users
who can benefit from running virtual machines. The aim of this paper
is to examine the impact of a virtual machine on real-time traffic, in
our case IP telephony based on the SIP and the RTP, which are now
the cornerstone of VoIP technology. This article also analyses the
impact of memory size and the number of processor cores on the
delay itself and its variance, thus allowing user to have full picture
when deciding what virtualization tool to use and how to configure
so it performs the best possible way.Scopus6231330
