Is there any way to configure how many rates we want to receive in a particular time interval through rmds test client?
You can speed up the update rate in Sink Driven Source using command line switches - launch it without command switches to see all available parameters.
There are canned data files which are provided for different regions (amers/emea/asia) which can be used with this replay. You can find them here.
Finally, the latest SDK bundles like EMA/ETA also contain Provider example which can be used as a source of simulated data to your application.