Abstract:
The availability of IT infrastructures is still
a huge challenge nowadays. As server
virtualization is used as an essential software
infrastructure of various software services in IT
environment and it is emerging as a technique to
increase system reliability and availability. To
prevent system failures caused by software
aging, software rejuvenation can be applied in
virtualized environment. Software aging of
virtual machine monitors (VMMs) is becoming
critical because performance degradation or
crash failure of a VMM affects all virtual
machines (VMs) on it. Live VM migration
enables a running VM on a host server to move
onto the other host server with very small
interruption of the execution. VM migration
depends on a variety of criteria and efficient
decision support is required. The work presented
in this paper aims to offer the high availability
against software aging of virtualized server
system by providing VM migration based VMM
software rejuvenation solution. First, we present
the resource usage as accepting as many
services as in virtualized environment which
support of VM migration. Second, we present
migration based VMM rejuvenation analytic
model and evaluate the steady-state system
availability based on familiar Markovian
analysis through the use of numerical analysis.
