Back in the day when working on OLTP systems there was a simple rule. All data presented to end-users had to be up-to-date and if it was distributed data, fully synchronised, no exceptions. The software infrastructure that supported this level of data integrity in environments that might well include multiple vendor's databases and multiple different OSs was XA standard 2PC (2 phase commit) and TPMs (Transaction Processing Monitors). It is very much to be hoped for that the b