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-Scope
------
-
-This document describes the user requirements on the smooth upgrade
-function of the NFVI and VIM with respect to the upgrades of the OPNFV
-platform from one version to another. Smooth upgrade means that the
-upgrade results in no service outage for the end-users. This requires
-that the process of the upgrade is automatically carried out by a tool
-(code name: Escalator) with pre-configured data. The upgrade process
-includes preparation, validation, execution, monitoring and
-conclusion.
-
-.. <MT> While it is good to have a tool for the entire upgrade process,
- but it is a challenging task, so maybe we shouldn't require automation
- for the entire process right away. Automation is essential at
- execution.
-
-.. <hujie> Maybe we can analysis information flows of the upgrade tool,
- abstract the basic / essential actions from the tool (or tools), and
- map them to a command set of NFVI / VIM's interfaces.
-
-The requirements are defined in a stepwise approach, i.e. in the first
-phase focusing on the upgrade of the VIM then widening the scope to the
-NFVI.
-
-The requirements may apply to different NFV functions (NFVI, or VIM, or
-both of them). They will be classified in the Appendix of this
-document. \ No newline at end of file