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Which type of DRS rule should be implemented for VM23 and VM43?

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?

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A.
Separate Virtual Machines

B.
Virtual Machines to Hosts

C.
Host DRS Groups

D.
Keep Virtual Machines Together

5 Comments on “Which type of DRS rule should be implemented for VM23 and VM43?

  1. Raj says:

    VM-Host Affinity Rules

    A VM-Host affinity rule specifies whether or not the members of a selected virtual machine DRS group can run on the members of a specific host DRS group.
    Unlike a VM-VM affinity rule, which specifies affinity (or anti-affinity) between individual virtual machines, a VM-Host affinity rule specifies an affinity relationship between a group of virtual machines and a group of hosts. There are ‘required’ rules (designated by “must”) and ‘preferential’ rules (designated by “should”.)
    A VM-Host affinity rule includes the following components.

    One virtual machine DRS group.

    One host DRS group.

    A designation of whether the rule is a requirement (“must”) or a preference (“should”) and whether it is affinity (“run on”) or anti-affinity (“not run on”).
    Because VM-Host affinity rules are cluster-based, the virtual machines and hosts that are included in a rule must all reside in the same cluster. If a virtual machine is removed from the cluster, it loses its DRS group affiliation, even if it is later returned to the cluster.




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  2. Raj says:

    Correct one is

    Create VM-VM Affinity Rules for MSCS Virtual Machines
    For MSCS virtual machines in a cluster, you must create VM-VM affinity or anti-affinity rules. VM-VM affinity rules specify which virtual machines should be kept together on the same host (for example, a cluster of MSCS virtual machines on one physical host). VM-VM anti-affinity rules specify which virtual machines should be kept apart on different physical hosts (for example, a cluster of MSCS virtual machines across physical hosts).
    For a cluster of virtual machines on one physical host, use affinity rules. For a cluster of virtual machines across physical hosts, use anti-affinity rules.
    Procedure
    1
    In the vSphere Client, right-click the cluster in the inventory and select Edit Settings.
    2
    In the left pane of the Cluster Settings dialog box under vSphere DRS, select Rules.
    3
    Click Add.
    4
    In the Rule dialog box, type a name for the rule.
    5
    From the Type drop-down menu, select a rule.

    For a cluster of virtual machines on one physical host, select Keep Virtual Machines Together.

    For a cluster of virtual machines across physical hosts, select Separate Virtual Machines.
    6
    Click Add.
    7
    Select the two virtual machines to which the rule applies and click OK.
    8
    Click OK.




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