Enable or Disable Root Domain Groups (Administrators)
This feature is available in SuperCluster version 3.0 (or later). To check your version, see Check the SuperCluster Virtual Assistant Version.
The main purpose of this feature is to enable you to limit the I/O Domains that will be affected by a root domain outage. Root domain groups enable you to assign I/O Domains to a specific root domain during I/O Domain creation (or thaw) so that planned maintenance only affects a pre-defined subset of I/O Domains.
Note that this feature only applies to network resources. It does not apply to core and memory resources.
When the Root Domain Group Feature is Disabled (the default)
The SuperCluster Virtual Assistant assigns network resources from any of the available resources on the selected physical host. If a physical host has more than one root domain, you cannot control which root domain will provide the network resources when the I/O Domain is created or thawed. This configuration is usually sufficient, because it allows the assistant to assign network resources from the full allotment of network resources available in the physical host.
When the Root Domain Group Feature is Enabled
You assign one or more root domains to a root domain group (see Create Root Domain Groups (Administrators)). The root domain group (instead of the physical host) provides the network resources to the I/O Domain when the I/O Domain is created or thawed.
This feature enables you to control, and to potentially isolate, which network resources are assigned to each I/O domain. For example, if each root domain is physically connected to a different endpoint, you can assign each root domain to a specific root domain group. When an I/O domain is created or thawed, select the root domain group that provides the desired network endpoint for that I/O Domain. If you need to shut down a root domain for maintenance, you know which network resources are provided by that root domain, and which I/O domains need to be shutdown.
Root domain groups only come into play during an I/O Domain creation or thaw. For example, if you create an I/O Domain called D1 and choose root domain group called RDG1, but later you modify the RDG1 root domain group, the modification has no effect on D1.
Toggling the Root Domain Group Feature
If you enable and configure root domain groups, then disable the root domain group feature, the last known root domain group configuration is kept in the assistant's database. Upon re-enabling this feature, you are redirected to the Physical Hosts page and advised by the assistant to review this last known configuration before performing other actions with the assistant.
- Access the SuperCluster Virtual Assistant.
- In the navigation panel, select Settings.
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In the Root Domain Groups drop-down menu, select enable or disable.
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Click Save.
If you enabled root domain groups, the SuperCluster Virtual Assistant displays the Physical Hosts page, prompting you to create at least one root domain group per physical host. In this case, go to Create Root Domain Groups (Administrators).