The performance equations and totalizers really don´t work in Secundary Archive in structure HA?
That is sadly true and is described as one of PI Data Archive server HA limitations. You can read them here.
One workaround is to enable the PI Performance Equation Scheduler and PI Totalizer subsystem service in each server with an identical configuration and have them run locally.
We advise you to take advantage of Asset Analytics feature from the Asset server side.
Yes true as @Jinmo Said.You can configure Buffer system on AF anlaysis server which can write to both collective members. AF Analysis provides more options interms of configuration and intergration with PI/AF related functionalities.
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