With all things technology there are advantages and disadvantages for all emerging technologies. Earlier i spoke about advantages of implementation of virtualisation, and how cost savings and server consolidation could be achieved with server virtualisation. Now im going to look at some of the disadvantages associated with virtualisation.
1. Magnified physical failures
Imagine you had 10 very important servers running on the one physical host and its internals (i.e. RAID controller fails) and wipes all the important information for all these machines.
2. Degraded Performance
Because more than one machine is running on the same physical host, performance can drop if all virtual machines need the resources at the same time. Leading to slower response times.
3. Increased Complexity
Virtualisation adds a new layer of complexity to the physical host running the machine, which in-turn can add considerable time and effort to work out the root cause of a problem if the issue is within the virtualisation layer.
4. Virtual Machine Spawl
Even though virtual server management can get quite complex, and installing a new machine can be quick. The problem might arise is that if the number of servers grows faster than the number of administrators who are supposed to manage them.
These are just a few of the disadvantages of virtualisation i have found on the internet related to virtualisation.
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