Ok, then what Ioannis provided above is an excellent starting point. Once you get specific details about your use case you can share these in the community to inquire about lower level details.
"huge calculations"? --many number of calculations on different fields.
I dint understand about 3 tier Qvd layer to again Qvd layer??
what is again QVD layer?
--- okie, yes..it's required some times to create multiple qvd layers to perform calculations and aggregation's(some times we can't perform all the aggregations on qvd layer1..then we will create 2nd qve layer to perform such kind of calculations)
