Need to watch out for update failure, some sort of transaction management/atomic commit[2] such that if one update fails, other updated dbs should rollback. 1.

Need to watch out for update failure, some sort of transaction management/atomic commit[2] such that if one update fails, other updated dbs should rollback. 1. https://en.wikipedia.org/wiki/Atomic_commit https://en.wikipedia.org/wiki/Atomic_commit