The method of guest VM backup can have an effect on the size of datastores used in a vSphere platform.
Answer(s): A
The RTO and RPO requirements and available hardware used in a solution can impact the size of datastores by limiting the amount of data that can be practically restored. This amount of data is the max size of the datastore.
From an operations management perspective, a design should not plan to use a virtual vCenter in a fully automated DRS cluster.
Answer(s): B
There are no reason a virtual vCenter should not be used from an operations management perspective. There should, however, be a process for managing the handling of a virtual vCenter outage (for example, DRS VM-to-host affinity rules and lockdown mode behavior).
You have been sent a query regarding a platform you have just designed and implemented. Following a maintenance window where VMware HA was disabled, the VMware HA settings were lost. How would you prevent this issue?
Disabling the vSphere HS cluster settings will change the entire configuration of the cluster from the HS perspective. If the Host Monitoring checkbox is selected, it will allow the configuration to remain; however, the isolation response or outage response will not occur.
VMware HA in vSphere 5.0 cannot survive more than five primary host failures. Thus, hosts should be physically placed in different racks, where possible, to avoid substantial impact.
This was true for VMware HA solutions prior to version 5. vSphere 5 can withstand multiple failures and uses a master/slave topology with a reelection process.
The size of a host can affect the business impact in the event of a VMware HA event.
The size and number of VMs running on a system can affect the impact of a system failure. For example, a larger per-host configuration with a smaller number of hosts per cluster would normally have a larger consolidation ratio; however, in the event of a failure, more guest VMs would be restarted, and this would be more likely to impact more applications.
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