HPP Enterprises P4000 SAN - Manual (Page 38)

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the resource pool changes. For example, if you shut down non-essential VMs or add hosts to the pool,
XenServer would make a fresh attempt to restart VMs. You should be aware of the following caveats:
 XenServer does not automatically stop or migrate running VMs in order to free up resources so that
VMs from a failed host can be restarted elsewhere.
 If you wish to shut down a protected VM to free up resources, you must first disable its HA
protection. Unless HA is disabled, shutting down a protected VM would trigger a restart.
You can also specify the number of server failures to be tolerated.
Figure 31. Configuring resource pool HP-Boulder-IT for HA
XenCenter provides a configuration event summary under the resource pool’s Logs tab.
Following the HA configuration, you can individually tailor the settings for each VM using its
Properties tab (select PropertiesHigh Availability).
If you create additional VMs, the Configure HA can be used as a summary page for status for all high
availability VMs.