Not necessarily.
Not so, if you use tools such as VeloStrata. They can 'stream' your workload into AWS/Azure, while the app storage back-end stays put (on prem) and back again, if you don't like the look of AWS/Azure.
Not so, if you use tools such as VeloStrata. They can 'stream' your workload into AWS/Azure, while the app storage back-end stays put (on prem) and back again, if you don't like the look of AWS/Azure.