Planet files take a long time to download and process, so if you can avoid doing it every week, you'll save yourself a lot of time and bandwidth. Fortunately, Osmosis can help you by automating much of the work involved using its replication tasks.
Given a suitably configured system, Osmosis will download and apply all the changes to the data since a planet file was created, creating a copy that's almost as up-to-date as the main OpenStreetMap database. Run the same commands regularly, and, in theory, you will never need to download another planet file.
In this section, we'll see how to: