you're missing the point. it's not the capability to handle data. it's the pain to backup a rotating dump file and a full datalog. one could try to backup using

you're missing the point. it's not the capability to handle data. it's the pain to backup a rotating dump file and a full datalog. one could try to backup using a replica, but the rdb gets sent over the wire ayway, and that's a load of bandwidth and disk and everything being thrown at the problem. it's madness. and that's before considering partitioning. good luck synchronizing snapshots of each shard at the same point in time - your restore will have all kind of inconsistencies for crossreferenced data.