HI Uma,
Not sure if you have gone through this but check this article and detaiiled step by step guidance to cover the migration process - https://learn.microsoft.com/en-us/azure/data-factory/connector-amazon-redshift?tabs=data-factory
Regarding the performance counters you will need to setup some sort of Jmeter or 3rd Party performance testing tools.
https://learn.microsoft.com/en-us/azure/data-factory/connector-amazon-redshift?tabs=data-factory
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