Hi Bruce,
Let me try to give an answer to your questions.
Q: How much time will require to initializing each data source and run each processing chains in BI/BW? Is there a calculation as 100 records=5 minutes?
A: This will depend on the technical infrastructure (e.g. CPUs, RAM), number of parallel processes, volume of data, the DataSource itself, other (loading) processes at the same moment, ... It's not easy to give a rule of thumb but BW should be able to process much faster than 100 records per 5 min.
Q: What will be the system impacts during the initialization and running the process chains in BI/BW?
A: Loading processes are normally CPU and memory intensive. So it will have impact on the performance on both source system (during extraction) and BW system (during data staging). You will have to balance the system load in conjunction with your technical infrastructure.
Q: Can updating of ECC occur while we run the extraction?
A: In principle yes, the delta mechanism should be able to handle that. Business Content DataSources are normally robust and using advanced delta mechanisms, e.g. using the RSA7 delta queue or timestamp.
Q: Can we run it during the daytime when the business operators are processing dats or at night after all the updating of SAP has occurried?
A: The best is to define batch processing time windows where user transaction processing is limited. In a regional setting this is normally the night. In global systems it can be a challenge to find such time windows but there are ways to handle that.
Best regards,
Sander
