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              [html]<thead><tr><td>PowerVC considerations</td></tr></thead><tbody><tr><td>BBP PrewnV1C6 an advanced vitualization and cloud management offering for BBP Prever Systems. Built on OpenStack. In provides comprehensive virtualization management and cloud desiryments for BBAR, BMI, Linus virtual machines ( VAR</td></tr><tr><td>Availability zones ( host groups )</td></tr><tr><td>Host groups, also known as livor agyrygusiss in OpenDiack ’ s terminology, allow you to create virual boundaries anxued a group of hosts. It is a logical group of hospitals, regardises of any leastures that they might or might not have in cor</td></tr><tr><td>When a host group is created by using the user interface, an availability zone with the same name is created and assigned to the host group. PowerVC also supports the standard OpenStack APIs for host groups and availability zones.</td></tr><tr><td>Host groups ( availability zones ) include the following features :</td></tr><tr><td>• Every host must be in a host group</td></tr><tr><td>Any hosts that do not belong to a user - defined host group are members of the default host group. The default host group cannot be deleted.</td></tr><tr><td>• Virtual machines are kept within the host group</td></tr><tr><td>A virtual machine can be deployed to a specific host or to a host group. After deployment, that virtual machine must always be migrated or remote restarted within the host group.</td></tr><tr><td>• Placement policies are associated with host groups</td></tr><tr><td>Every host within a host group is subject to the host group ’ s placement policy. The default placement policy is striping.</td></tr><tr><td>• Automated Remote Restart</td></tr><tr><td>If enabled, the PowerVC monitors hosts for failure by using the Platform Resource Scheduler ( PRS ) HA service. If a host fails, PowerVC automatically remote restarts the WMs from the failed host to another host within a host group.</td></tr><tr><td>• Dynamic Resource Optimizer ( DRO )</td></tr><tr><td>If enable, DRCI continuously monitory sour closed environment ’ s usage. You can specify that DRO monitors CPU usage or available memory. When a host is found to be overused, ORO alterptis to connect the siluation by performing the actiont</td></tr><tr><td>Note : A host can belong only to one host group ( availability zone ).</td></tr></tbody>
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