As a virtual infrastructure administrator or other IT professional, you determine that compute and storage resources in a given data center are unpredictable and a regularly scheduled rebalancing action would address the problem.
vRealize Operations Manager monitors virtual objects and collects and analyzes related data that is presented to you in graphical form at the Workload Balance screen. Depending on what appears, you may determine that you need to schedule rebalancing functions to distribute workload more evenly in a data center or custom data center.
Ensure you have all required permissions to access the Workload Balance UI and manage vCenter Server objects.
- From the Home screen, click Workload Balance in the left pane.
- In the Select a Data Center to Review Workload pane, select a data center for which you want to schedule repeated rebalance actions.
- In the Is Workload Balanced? pane, click SCHEDULE.
- Give the schedule a name and choose a time zone.
- Determine how often you want to repeat the rebalance action and click the relevant radio button under Recurrence.
Depending on your selection under Recurrence, additional options appear to the right. In this instance, you choose to repeat the rebalance daily.
- Leave the current date and time.
- Select the Repeat every day radio button.
- Select the Expire after radio button and tick the counter up to 6.
- Click Save.
The rebalance action repeats for six days, then stops.
At the Workload Balance page, the Scheduled button appears in the upper right of the Are clusters balanced? pane as long as rebalance actions are scheduled for the selected data center. If you want to edit or delete a schedule, click the Scheduled button. The Using Rebalance Schedules page appears, where you can perform those actions.
If you schedule a number of rebalancing actions close together, and the rebalance plans of two or more actions include overlapping functions, that is, they impact the same set of resources, the system shifts the actions into a queue. As a result, some actions may complete later than expected, with longer running actions and other potential system constraints extending the lag time. Rebalancing actions that do not overlap can run concurrently.
What to do next
To confirm that your rebalance action was finished, go to the Recent Tasks screen by selecting Administration on the menu, and clicking in the left pane. In the Recent Tasks screen, use the Status function on the menu bar to locate your action by its status. You can also search using a range of filters. For example, filter on Event Source and enter the name of the scheduled rebalance plan.
Because real-time data center resource contention is dynamic, the system calculates a new rebalancing plan each time the scheduled rebalancing action starts, but before it executes. If the system determines that the data center container is balanced at this moment, then the action is not executed. On the Recent Tasks page, the name of the affected data center appears in the Object Name column, and the Message “The balance of the selected container cannot be improved” appears under Details . Another possibility is that a scheduled rebalancing plan is attempted, but does not go forward. In this event - which is not the same as a "failed" action - the name of the affected data center also appears in the Object Name column.