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For example, consider a cluster that contains hosts with Intel Xeon 45 nm Core two processors that are
set to the Intel Merom Generation (Xeon Core 2) EVC mode. When you power on a virtual machine in this
cluster, it runs in the Intel Merom Generation (Xeon Core 2) EVC mode. If the EVC mode of the cluster is
raised to Intel Penryn Generation (Xeon 45 nm Core 2), the virtual machine remains at the lower Intel
Merom Generation (Xeon Core 2) EVC mode. To use any of the features exposed by the higher cluster
EVC mode, such as SSE4.1, you must power off the virtual machine and power it on again.
Procedure
1 In the vSphere Client, select a cluster or a host in the inventory.
2 Click the VMs tab.
A list of all virtual machines in the selected cluster or on the selected host appears.
3 If the EVC Mode column does not appear, click the arrow in any column title, select Show/Hide
Columns, and select the EVC Mode check box.
The EVC Mode column shows the EVC modes of all virtual machines in the cluster or on the host.
Important The EVC Mode column displays the EVC mode defined at the virtual machine level.
However, if you do not configure per-VM EVC for a virtual machine, the virtual machine inherits the
EVC mode of its parent cluster or host. As a result, for all virtual machines that do not have per-VM
EVC configured, the EVC Mode column displays the inherited cluster-based EVC mode.
Important If the virtual machine is running in an EVC cluster, its EVC mode is determined in the
following manner.
Per-VM EVC Cluster-level EVC EVC Mode for the Virtual Machine
Enabled Enabled Enabled. The EVC Mode column
displays the EVC mode of the virtual
machine.
Disabled Enabled Enabled. The EVC Mode column
displays the EVC mode of the EVC
cluster.
If a virtual machine is powered off and is in an EVC cluster, theEVC Mode column always displays
the per-VM EVC mode.
Migrating Virtual Machines
You can move virtual machines from one host or storage location to another location using hot or cold
migration. For example, with vSphere vMotion you can move powered on virtual machines away from a
host to perform maintenance, to balance loads, to collocate virtual machines that communicate with each
other, to move virtual machines apart to minimize fault domain, to migrate to new server hardware, and so
on.
vSphere Virtual Machine Administration
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