Hello, we are working on a constant currency Actuals scenario that will be using alternate FX rates and are in the process of testing a Hybrid Scenario with the 'Copy Input Data From Source Scenario' setting. We are running the data copy with a 'Force Calculate' Data Management Step using the 'Execute Scenario Hybrid Source Data Copy' setting. We have found that after resetting the hybrid scenario, the first run of the copy step is taking around 50 minutes to complete, but subsequent copies are only taking 7 minutes. Is this expected with a hybrid scenario copy?
The whole system is based on actions triggered by Calculate. If you're worried about losing or overwriting data you've already calculated, though, there are two options you should check: the "Clear Calculated Data During Calc" boolean on Scenario properties, and the "durable data" options in api.Data.Calculate (which allows you to manage the lifecycle of calculated data explicitly, as you see fit). There is also the ExecuteCopyDuringCalc option that you can pass (True/False) if you want to be in control of when the copy happens.
It makes a bit more sense if you think of Hybrid Scenarios as a feature to help analysis (and hence, expects calculations to have been run) rather than a seeding tool.