This section explains the differences between the OpenStack to a newer major release upgrade and OpenStack packages update.
The main purpose of update is to provide minor updates for the OpenStack packages without changing the major versions of packages.
| Upgrade | Update | |
|---|---|---|
| Package versions | Between the package versions supported by the sequent major OpenStack releases. For example, upgrade of Nova v15.0.1 (included in Ocata) to v16.0.1 (included in Pike). | Between the package versions within a single major OpenStack release. For example, update of Nova v15.0.1 (included in Ocata) to v15.2.0 (included in Ocata). |
| Database syncs | Performed and required | Can be performed but are not required |
| Control plane downtime | Required and expected | Not expected as the control plane nodes will be updated one by one |