Manage CPU cores in Azure Stack HCI clusters
To manage workload demands, power consumption and licensing cost, you can change the amount of CPU cores allocated to a cluster by using the "Update CPU core" feature. This feature also helps you to optimize CPU cores in clusters to keep the Total Cost of Ownership (TCO) at an optimal level.
- Ensure that the cluster contains homogenous nodes. For example, the nodes must have the CPUs either from Intel or AMD and from the same processor family. Having nodes that include CPUs from both Intel and AMD or from different processor family is not supported.
- OMIMSWAC Premium License for Microsoft HCI Solutions must be installed on each cluster node.
- In Windows Admin Center, connect to a cluster.
- In Windows Admin Center, under Extensions, click Dell EMC OpenManage Integration.
- In Dell EMC OpenManage Integration, click the Configure tab.
- Under CPU Core Management, a summary of CPU core distributions of the cluster nodes or individual node is displayed as follows:
- The horizontal bar chart under CPU Core Configuration Summary displays the number of cores that are currently enabled in the cluster or individual node and the number cores available for use. The maximum number of CPU cores present in the node or cluster is mentioned below the bar chart.
- Under Current Configuration, total number of nodes, CPUs, and currently enabled cores along with CPU model number are displayed.
- Switch the Show Node Level Details on or off to show or hide the node details such as node name, CPU model used in the node, number of CPUs, number of cores per CPU, and core speed.
- In the Show Node Level Details, select a node to see the Advanced Details of the node as follows:
- Dell Controlled Turbo with status enabled or disabled.
- Logical Processor with status enabled or disabled.
- Configurable TDP with status enabled or disabled.
- Virtualization technology with status enabled or disabled.
- X2APIC mode with status enabled or disabled.
- To manage CPU cores, click Update CPU Core.
The Update CPU Core wizard is displayed on the right.
- In the Update CPU Core wizard, move the slider left or right to increase or decrease the number of cores to be used based on workloads.
Based on the CPU core manufacturer (Intel or AMD), you can configure the cores in the following table. To maintain cluster homogeneity, OMIMSWAC applies the same configuration across all nodes in the cluster.
Note: Changing the number of cores impacts the overall core count of the cluster. Ensure that you are using the right number of cores to maintain the balance between power and performance.
Table 1. CPU
| Intel CPU || |
- Select the number of cores you want to enable per CPU.
- Minimum number of cores that can be enabled is four. You can enable all the cores that you want to manage workloads.
| AMD CPU || N/A |
- Select one of the following options to apply the changes and reboot nodes:
- Apply and Reboot Now: Select this option if you want to apply the changes and reboot the cluster nodes now. Dell Technologies recommends using this option as the nodes are rebooted automatically by taking care of the workloads using cluster aware feature.
- Apply at Next Reboot: Select this option if you want to apply the changes now and reboot the cluster nodes later. Ensure that you reboot the cluster nodes later to successfully apply the CPU core changes. Also, ensure to take care of the workload before rebooting the nodes.
Note: The Apply and Reboot now process requires the CredSSP to be enabled. To improve security, disable CredSSP after the CPU configuration changes are complete.
- To apply the changes, click Confirm.
Under Resources, the status of the changes is displayed. Click View Details to see the progress at a node level.