Hi, I have the following situation Machine - A equiped with - a database - Internet application that receives records and stores them into a table on this machine Machine - B equiped with - the same database - the same internet application but it only receives records when machine A is down What I would like to achieve is that the tables in both databases are kept consistent. How to do this with postgres ? Do a write a C-program for that that is started by a trigger ? Thanks, Feite Brekeveld