Lately I've been getting a lot of notifications for BDR (short for Bi-Directional Replication) from EDB; the term 'Always On' also appears in those notifications, apparently to woo the Oracle audiences. You might want to take a look into that.

Disclosures/info: I used to work for EDB. BDR was developed by 2nd Quadrant, which was recently acquired by EDB.