Scenario Development

The IT administration team are selecting the specification for a new cluster of hypervisors that support high availability and vMotion. They want to ensure that high availability protection is retained, even when they are carrying out maintenance tasks on individual hypervisors. The plan currently defines that the following servers are hosted on this particular cluster:

TR$101-$File

TR$102-$File

TR$103-$Web

TR$104-$Web

TR$105-$Web

TR$106-$CRM

TR$107-$CRM

TR$108-$Fin

TR$109-$Fin

TR$110-$QA

TR$111-$Dev

TR$112-$Dev

TR$113-$Dev

TR$114-$Test

TR$115-$Test

TR$116-$Test

TR$117-$Test

TR$118-$HR

TR$119-$HR

TR$120-$HR

Fault tolerance must protect both Fin servers.

Activity assumptions

For the completion of this activity, the following assumptions are made:

Each virtual machine requires $5GHz$ of CPU and $8GB$ RAM.

Two cores, running at $2\mathrm{.}5GHz,$ can provide the CPU capacity required for such a virtual machine.

$*$Each server has $2$ CPUs with $8$ Core @ $2\mathrm{.}5GHz$ and $64GB$ of RAM.

Activity instruction

A new hypervisor cluster, providing capacity for $20$ servers, is to be designed to support high availability and live migration. Support for fault$-$tolerant systems must be included.

How many of these servers must be configured for this cluster?

$-$How much spare capacity is there in this solution under normal operations?

How could this be improved to protect only critical systems in case of failure?