Summary

In this chapter, we learned about streaming replication with PostgreSQL and saw how straightforward it is to configure it. We stated that it is the base solution for numerous high availability architectures, and then we presented Heimdall, which, based on streaming replication and thanks to its load balancing and high availability features, demonstrated how, in the event of a failure in the master server, it can continue to provide a service without the end customer being aware of this. In the next chapter, we'll explore New Relic and how we can use it to create team dashboards for various applications.