Thanks for the reply. Regarding hardware failure, I could use my current configuration as a good example. We have 5 OES servers as a result of a design decision made many years ago; have several servers, each doing one or two things, so that if any one server goes down we don not loss all network services. With this configuration, if one server suffers a catastrophic failure (say a backplane fails) I can maintain most other services.
Now if I were to have one VM host running five VMs so that no one VM runs more than one or two services, I have the same separation of services. However, the difference being if my host now suffers a catastrophic failure, I loss all the VMs and all services. I am not saying this is likely, but it is something I would worry about.
I do like the many other benefits of VMs pointed out in other thread responses, and they many in fact out-weigh the downside.
KBOYLEKBOYLE@no-mx.forums.novell.com 2/19/2013 3:38 PM >>>
On the other hand hardware failure can result in a world of hurt if
all your VMs go down at once.
If you mean that you /could/ have multiple corrupted servers to repair,
then I would agree with you but proper backups should mitigate that
risk. Whether all your services are on a single physical server or
spread across multiple virtual servers, the result of a hardware
failure is essentially the same.
Multiple virtual servers allow you to isolate servers/services and even
install mutually exclusive OES services on the same box.
Kevin Boyle - Knowledge Partner
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