A single postgres daemon- a unit of scaling- can support many datomic transactors yes ,each talking to a named "database" hosted by that one daemon. No. That

A single postgres daemon- a unit of scaling- can support many datomic transactors yes ,each talking to a named "database" hosted by that one daemon. No. That would imply distributed writes and break the single write serializability property of datomic. Think about it, transactors don't sync with each other(only one for HA but that's orthogonal). To put it simply, multiple transactors can share the same storage but only one can write to a single database at a time.