Allocation model defines how much CPU, memory, or disk space is allocated to objects in a cluster or datastore cluster. In the policy, you can turn on the Allocation Model element and configure the resource allocation for the objects.

How the Allocation Model Element Works

The Allocation Model element determines how vRealize Operations Manager calculates capacity when you allocate a specific amount of CPU, memory, and disk space resource to clusters or data store clusters. You can specify the allocation ratio for either one, or all of the resource containers of the cluster. Unlike the demand model, the allocation model is used for capacity calculations only when you turn it on in the policy.

The allocation model element also affects the reclaimable resources for memory and storage in Reclaim page. When you turn on the Allocation Model element in the policy, the tabular representation of the VMs and snapshots in the selected data center from which resources can be reclaimed displays reclaimable memory and disk space based on the overcommit values.

Where You Override the Allocation Model Element

To view and override the policy workload analysis setting, in the menu, click Administration, and then in the left pane click Policies. Click the Policy Library tab. Click the Add New Policy icon to add a policy or click the Edit Selected Policy icon to edit a policy. In the Add or Edit Monitoring policy workspace, click Analysis Settings and click All object types. The analysis settings for the object types appear in the right pane.

Click the unlock icon next to Allocation Model to set the overcommit ratios.

Table 1. Policy Allocation Model Element Settings
Option Description

Set overcommit ratio, to enable Allocation Model

Allows you to set the overcommit ratio for CPU, memory, or disk space. Select the check box next to the resource container you want to edit and change the overcommit ratio value.