Manage categories and tags

Compute Categories and Tags are used to specify which application instances run on a compute node. An instance can be migrated from one compute node to another by modifying the compute category or tags of the instance.

Migrating an instance from one compute node to another involves zero downtime, continuous service availability, and transaction integrity. The ThinkAgile CP Cloud Controller VNC console to an instance uses a URL that includes the compute node's IP address. When an instance migrates to a new compute node, the VNC console will automatically close since the URL is no longer valid, and reopening it will open a URL including the new compute node's IP address.

Refer to the following topics:

• What are compute categories?
  Compute categories are used to organize compute resources for allocation to virtual datacenters. If needed, you may also restrict an application instance to run only on nodes in a specific compute category. Compute resources are allocated to virtual datacenters by category. When you create or edit allocations for a virtual datacenter, you enter the amount of CPU and memory to allocate from each category, rather than from individual compute nodes.
• Add a compute category
  Follow these steps to add a compute category.
• Rename a compute category
  Follow these steps to rename a compute category.
• Delete a compute category
  Follow these steps to delete a compute category.
• What are compute tags?
  Compute tags are used by application instances and nodes to determine which nodes are eligible to run an application. If an instance lists compute tags in its resource profile, only nodes with all of those compute tags will be able to run that instance.
• Add a compute tag
  Follow these steps to add a compute tag.
• Rename a compute tag
  Follow these steps to rename a compute tag.
• Delete a Compute Tag
  Follow these steps to delete a compute tag.