To complete our suite of popular logical replication tools, we would like to introduce Londiste. It is one of the SkyTools PostgreSQL utilities contributed by Skype in 2007. Why another replication system? Due to other capabilities offered by this suite of tools, you may decide to use one or more of them. Knowing how to leverage Londiste can simplify the total software stack and thereby increase server stability and simplicity.
In addition, like Bucardo, its usage is much simpler than Slony due to its suite of command-line tools. Let's continue with the installation of Londiste on two PostgreSQL servers, and perhaps, we might utilize other SkyTools functionality later.
At the time of writing this book, the latest version of Londiste is 3.1.5. Download the latest source package from PGFoundry at http://pgfoundry.org/projects/skytools.
Londiste is written in Python and uses the psycopg2 PostgreSQL database library. Make sure that this is installed before continuing...