Why do you keep repeating 50 w/s when that's not an actual performance number? CDB will likely run with thousands of ops/sec per node.
Can you really not see why distributed databases are needed? High availability, (geo) replication, active/active, oversized data, concurrent users, and parallel queries are just a few of the reasons.
Distribution will always come with a cost, but the tradeoffs are for every application to make. We use a distributed SQL database and while it's faster than any single-node standard relational DB would be, speed isn't the reason we use it.
Can you really not see why distributed databases are needed? High availability, (geo) replication, active/active, oversized data, concurrent users, and parallel queries are just a few of the reasons.
Distribution will always come with a cost, but the tradeoffs are for every application to make. We use a distributed SQL database and while it's faster than any single-node standard relational DB would be, speed isn't the reason we use it.