In this chapter we have discussed Skytools, a tool package provided and developed by Skype. Skytools provides you with generic queues as well as a replicator called londiste. In addition to that Skytools provides a set of additional tools such as walmgr, which can be used to handle WAL files.

The next chapter will focus on Postgres-XC, a solution capable of scaling reads as well as writes. It provides users with a consistent view of the data and automatically dispatches queries inside the cluster.