This feature is available starting with SuperCluster version 2.3.
You can move Database and Application I/O Domains from one physical host to another with the freeze and thaw feature. You can also use the feature if you want to temporarily suspend an I/O Domain and have the CPU, memory, and network resources that were being used by that I/O Domain made available to other I/O Domains:
Freeze – Saves the I/O Domain configuration information, suspends (freezes) the I/O Domain, and returns CPU, memory, and network resources to the pool and can be used to deploy other domains . The storage and data associated with the I/O Domain are preserved, and are returned to the I/O Domain when the I/O Domain is thawed. At any time, the frozen I/O Domain can be thawed, at which point resources are reassigned to the I/O Domain, and it is brought back to the Ready for Use state.
In some cases, additional auxiliary iSCSI LUNs might be associated with an I/O Domain, for example to provide cluster quorum devices or file systems for zones in I/O Domains. The freeze function preserves the auxiliary iSCSI LUNs, but the assistant only enables you to thaw such I/O Domains on physical hosts that can access the auxiliary iSCSI LUNs.
You can edit the I/O Domain while it is frozen. This enables you to increase or decrease the amount of CPU and memory resources before you thaw the I/O Domain. See Edit a Frozen I/O Domain.
Thaw – Reconfigures the I/O Domain on the physical host that you specify, reassigns the same number of resources, re-establishes connectivity to the original storage resources, and brings the I/O Domain back to the Ready for Use state.
The assistant only enables you to thaw a frozen I/O Domain on physical hosts that have sufficient resources to host the I/O Domain.
In the case where a frozen I/O Domain has additional auxiliary iSCSI LUNs, there might be additional restrictions placed on the physical host on which the frozen I/O Domain can be thawed. Auxiliary iSCSI LUNs used to provide file systems for zones in I/O Domains are also thawed as part of this process, and any non-global zones hosted on auxiliary iSCSI LUNs return to the same state that they were in prior to the freeze action. Auxiliary iSCSI LUNs used to provide cluster quorum devices are also thawed, but might need some manual interaction to return them to the state they were in prior to the freeze action.
Users with the administrator role can freeze and thaw any I/O Domain. Users with the user role can only freeze and thaw I/O Domains they own.
These topics describe how to freeze and thaw an I/O Domain.