"So now you’ve got customer data stored in two places, and you need to sync them. Syncing can actually be a challenge: Which database is the “master”? How oft

"So now you’ve got customer data stored in two places, and you need to sync them. Syncing can actually be a challenge: Which database is the “master”? How often should they be synced? " I've called this problem the "Non-Authoritative Data Source" problem for years - NADS. Never quite caught on though...