My opinion is evolving on this matter. I've seen a more than a couple of developer introduced bugs in our application that cause data loss (improper error handl

My opinion is evolving on this matter. I've seen a more than a couple of developer introduced bugs in our application that cause data loss (improper error handling, swallowing errors instead of retrying, etc.) We use RDS with automatic failover and redislabs cluster with automatic failover. I'm 99% positive we have lost data before, and it makes me very uncomfortable to think about. But since we lose data from buggy code, I really can't really justify a huge amount of engineering effort to avoid the chance of loss in DB failover.