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A vSphere environment is created with two virtual machines, VM23 and VM43. Each virtual machine has an instance of the front-end web application for the company’s manufacturing management database. A physical load-balancer is configured for the application. Which type of DRS rule should be implemented for VM23 and VM43?
A. Separate Virtual Machines
B. Virtual Machines to Hosts
C. Host DRS Groups
D. Keep Virtual Machines Together
Correct Answer: A
Explanation/Reference:
http://www.vmadmin.co.uk/vmware/36-virtualcenter/59-drsvmhostrules
It is possible within Virtual Center using DRS to ensure virtual machines are always on separate physical hosts. It is also possible to make virtual machines stay together on the same physical server if you needed that.
You might want to do this if you have a Microsoft cluster in virtual machines and want to ensure that both cluster node VMs are always on different physical servers. In the meantime you can also benefit from vMotion using DRS of these virtual machines to other physical ESX servers, provided that they are separate.