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diff --git a/doc/04-Use_Cases_and_Scenarios.rst b/doc/04-Use_Cases_and_Scenarios.rst new file mode 100644 index 0000000..13d16cf --- /dev/null +++ b/doc/04-Use_Cases_and_Scenarios.rst @@ -0,0 +1,32 @@ +Use Cases and Scenarios +----------------------- + +This section describes the use cases and scenarios to verify the +requirements of Escalator. + +Upgrade a system with minimal configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +A minimal configuration system is normally deployed for experimental or +development usages, such as a OPNFV test bed. Although it dose not have +large workload, but it is a typical system to be upgraded frequently. + +Upgrade a system with HA configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +A HA configuration system is very popular in the operator's data centre. +And it is a typical product environment. It always running 7 \* 24 a +week with VNFs running on it to provide services to the end users. + +Upgrade a system with Multi-Site configuration +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Upgrade in one site may cause service interruption to other site, if +both sites are depended and sharing the same modules/data base (e.g. a +keystone for both sites). + +If a site failure during an upgrade, the roll-back missing any minimal +state/data loss can cause an affect/failure to the depended site. + +.. <hujie> Consider one site of ARNO release first. Then, multi-site + in the future.
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