Terminology
Because IBM® Power® Virtualization Center is built on the OpenStack technology, you might see some terminology in messages or other text that is not the same as what you see elsewhere in PowerVC. There is also some terminology that might be different from what you are used to seeing in other Power Systems products.
| Term | Description |
|---|---|
| collocation rule | Collocation rules are used to specify that selected virtual machines must always be placed on the same host (affinity) or can never be placed on the same host (anti-affinity). In OpenStack, collocation rules are called Server Groups. |
| deploy templates | Deploy templates allow authorized users to quickly, easily, and reliably deploy an image. A deploy template contains everything you need to deploy an image, including the deploy target, the storage connectivity group to use, the compute template to use, the size of the virtual machine to create, and so on. After the deploy template has been created, it is simple to use the template to create one or more virtual machines. |
| external IP address | A public facing IP address that is attached to a virtual machine on a network overlay. The virtual router then uses network address translation to change the IP address as appropriate. OpenStack uses the term floating IP address instead. |
| host | In PowerVC, a host is a physical server that contains physical processors, memory, and I/O resources. In OpenStack, a host can be a server or a storage provider. |
| host group | In PowerVC, host groups are used to draw a logical boundary around a group of host systems. In OpenStack, this is called a host aggregate. |
| hot migration | Moving a running virtual machine from one host to another. Hot migration is also known as Live Partition Mobility or active migration. |
| migration | Moving a virtual machine from one host to another. Migration is also known as partition mobility. |
| project | Resources belong to a project. This allows for resources to be made accessible to a single user by giving that user their own project. Alternatively, multiple users can be given access to the same resource by giving each of those users a role on the project in question. Projects are sometimes referred to as tenants. |
| remote restart | You can use PowerVC to remote restart virtual machines from a failed host to another host. In OpenStack, this is called evacuate. |
| requests | Requests are any actions that require administrator approval before they can complete. PowerVC for Private Cloud sends an approval request when a user attempts an operation that an administrator has set up to require approvals. |
| self service portal | The functionality that is in PowerVC for Private Cloud and is not in PowerVC Standard edition. This includes the ability to create and use deploy templates. Accessing the self service portal requires self_service or administrator authority. |
| self service user | A user that has been granted self_service authority. Self service users can access the self service portal. |
| template | Default configurations for virtual machines (called compute templates) and storage volumes (called storage templates). Called flavors in OpenStack. |
| virtual machine (VM) | The collection of processor, memory and I/O resources defined to run an operating system and its applications. Virtual machines are also called logical partitions or LPARs (in a Power Systems context) and instances (in an OpenStack context). |