Replication of postgres database at table level

Question

I am just wondering whether it would be possible to replicate only a table in a postgres database with another database instance. For example, lets say that I have a postgres instance running at hostA and another instance at hostB. Lets say i have a relation called "user" in a database called "database1" in hostA and i want to replicate this with a different database called "database2" at hostB. How can we go about it?

Answer 1

Slony-I can do this: http://slony.info/documentation/2.1/preface.html#INTRODUCTION

But Slony might be quite an overhead if it's really only a single table.

For just a single table you could write a trigger that updates the table on the other host through DbLink .