PFLOPs is no longer a ”supercomputer” thing. Now you can purchase NVidia DGX-1 with Tesla V100 for $150K. This gives you almost a petaflops. If I am reading it right, price of 1 PFLOPs in above mentioned super computer is $6M. That’s insane.
I don't think all of 400 crore allocation went to building this particular machine; entire met department is migrating to dynamic modeling.