Configure Resource Groups
All server instances must belong to a resource group. The resource group is identified by a set of physical cores that are members of the group and is associated with some number of datastores and networks.
CPU Core Assignment
When creating or editing a resource group, a system administrator controls which cores are assigned to the group and therefore on which physical cores a server in the group can execute on. Additional attributes of a resource group are the CPU scheduler and pinning policy that is to be applied across the selected cores, and the CPU core overcommit policy as well as Fault Tolerance.
To create a resource group:
- Click the Resource Group tab.
- Click the Create Resource Group button.
- Fill in the configuration form step by step:
What should you see if there is no Resource Group available?
If the system has not been configured previously, then the Resource Groups menu option should present the following:
Step 1 - Select Storage Optimisation / Enable Fault Tolerance
The Storage Optimisation option is enabled by default.
In context of cores assignment, 'CPU overcommit' attribute is supported and can be applied across all the selected cores. This feature provides the capability to allocate more than 1 virtual cores to a single physical core.Specifically, user can choose in range of 2 to 8 virtual cores assigned in one single core
By enabling 'CPU Pinning' attribute, each virtual core corresponds to only one psysical core, as a result 'CPU overcommit' is disabled.
The 'Enable Fault Tolerance' option allows you to specify the Unit of fault tolerance required (Blade/Chassis/Rack) and the maximum number of Units allowed to be lost whilst still remaining fault tolerant.
Also visible is the option to Automatically Failover in the case of a failed Unit.
Step 2 - Select available datastores that will hold VM data
Select one or more data stores that are accessible to the resource group according to step 1 selections
Step 3 - Select the compute node resources (NexVisors)
Select the members (compute nodes) that you want to make part of the resource group.
Step 4 - Select the cores that will be assigned to the group
Select the cores on each member to assign to the resource group.
Step 5 - Assign the networks to which the instances may have access
Select one or more networks that are accessible to the resource group.
Step 6 - Finalise the configuration
Enter a name and description. Click the Finish button to complete the resource group creation.
What should you see when a Resource Group is available?
If the system has been configured previously, then the Resource Groups menu option should present the following:
Emphasis on the GREEN ICON that indicates that the resource group is storage optimised.