34
Now that the organisation is benefiting from a
fully monitored and automated high availability
OGY
solutions that protect both individual applications
and VM’s, it doesn’t make sense to sacrifice these
TECHNOL
facilities when moving from primary servers to a
virtual VMware implementation
A
TION
Given that these types of availability or disaster monitored and automated high
ALIZ
issues are so much more recovery. Solutions that allow availability solutions that
common than physical organisations to clone an protect both individual
TU
hardware failures, it is clear application and keep data applications and VM’s, it
VIR that virtualization on its own synchronised with a replica doesn’t make sense to
still does not address all the copy means multiple critical sacrifice these facilities when
requirements for continuous applications can be migrated moving from primary servers
availability – keeping your onto a VMware platform, and to a virtual VMware
business running and end run in parallel, without implementation. This is where
users connected no matter interrupting service delivery solutions that support failover
what the cause of an outage. from the physical platform from virtual-to-virtual
during the migration. Once the environments come into play.
Taking advantage of the application has been cloned
advanced capabilities of onto the virtual platform, This is a natural extension that
VMware, customers can use automated switchover can be delivers the benefits of
resource optimisation through initiated by moving control to virtualization without
VMware’s DRS and VMotion the virtual clone. compromising the need for
technology that can be a continuous availability. It also
great aid in delivering well- The key benefit of this makes no demands on
configured, optimised approach to P2V migration is particular storage
systems. It’s worth bearing in that the service can also be requirements allowing the re-
mind though that moving a switched back from virtual-to- use of direct attached storage,
VM from one physical host to physical without service if appropriate. Organisations
another provides no benefit interruption, should anything implementing virtualization
for availability if the go wrong. The system’s ability must seriously consider how
application has failed. to synchronise data back as they are going to protect the
part of this switchback means core components that deliver
A VM that is “sick” on one no data will be lost. Unlike added functionality within
host will remain “sick” on other single-direction P2V virtual environments, such as
another. In addition VMotion’s migration strategies, this VirtualCenter and Virtual
capability depends upon a gives the customer complete Machine Manager. By focusing
persistent connection to confidence that the migration on the continuous availability
VMware VirtualCenter. Should is reversible without risk. This layer of applications,
VirtualCenter fail, the ability approach also provides an businesses can greatly reduce
to manage the VMware immediate opportunity to the numerous risks associated
infrastructure is severely implement a high availability with P2V migration and focus
diminished. Therefore, Virtual solution as the first step in on the tangible benefits
Center itself, as a single point the virtualization lifecycle. virtualization can bring.
of control, has no effective Now that the organisation is
mechanism for high benefiting from a fully www.neverfailgroup.com
MAR/APR 09 WWW.SNS-UK.CO.UK
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