The Plan View
The Plan View runs simulations for what-if scenarios that explore possibilities such as:
- Optimal workload distribution across existing resources
- Changing hardware supply
- Impact of downsizing, or removing resources
- Optimal workload distribution to meet historical peaks demands
- Projected infrastructure requirements
As it runs a planning scenario, Operations Manager repeatedly executes shopping cycles on the snapshot market until it arrives at the optimal conditions that market can achieve. When it reaches that point, the Economic Scheduling Engine cannot find better prices for any of the resources demanded by the workload — the scenario stops running, and it displays the results as the desired state. The display includes the resulting workload distribution across hosts and datastores, as well as the actions the scenario executed to achieve the desired result.
For example, assume you run a plan that adds virtual machines to a cluster. The plan runs repeated shopping cycles, where each entity in the supply chain shops for the resources it needs, always looking for a better price — looking for those resources from less-utilized suppliers. These shopping cycles continue until all the resources are provided at the best possible price.
The results might show that you can add more workload to your environment, even if you reduce compute resources by suspending physical machines. The recommended actions would then indicate which hosts you can take offline, and how to distribute your virtual machines among the remaining hosts.
To run plans, open the Plan View, start a new plan, then configure and run the plan. Plan setup includes the following:
|Scope||Limit the physical devices that are included in the planning scenario—for example, limit to a given cluster. See Setting Plan Scope|
|Projection||Enable Projection Planning, then specify the end date and the frequency for a projection plan. A projection plan reiterates its runs to calculate requirements into the future. For each time period you specify, a plan runs to add workload or perform the specified changes on top of the previously run results. This shows how your environment will change over time.|
|Demand||Specify workload parameters for the plan—add or remove VMs, to change load, or demand in your environment. See Specifying the Plan Workload.|
|Supply||Specify resource parameters for the plan—add or remove hosts or datastores, to change supply in your environment. See Specifying the Plan Workload.|
|Baseline||Specify baseline utilization statistics for the plan. The baseline types you can set are:For more information, see Set Baseline from History.|
|Advanced Settings||Specify advanced parameters for utilization, VM Constraints, and Workload Placement. See Setting Advanced Options.|
|Run the plan. The plan can recognize existing constraints (clusters, network/storage constraints, and workload placement policies), or it can disable the constraints before running (Ignore constraints). While a plan is running, the Stop button appears. You can stop a running plan if necessary. See Running Plans|