PgConf.Russia 2020

Corosync & pacemaker is a well known solution for creating fault-tolerant clusters. Such clusters can contain 3 working nodes or 2 working nodes and one voting-only node. The cluster can be deployed on physical or virtual servers.

This tutorial will demonstrate the process of installation and tuning of a PostgreSQL fault-tolerant cluster. You will learn that it is not so difficult as seems to be from the first glance.

At the master class, we will learn how to execute fast load tests of Postgres databases: optimizing database configurations, data structure, indexes, OS settings, etc. To do this, we will create a code, build the infrastructure for the test from it and will do the test. As a result, we get a flexible tool in the code to which you can attach any monitoring, and for which you don't have to pay a lot of money, because the environment is created in 7 minutes in an empty AWS account and destroyed after test

pg_probackup is a flexible tool that allows choosing the backup strategy depending on the write load of the PostgreSQL cluster, as well as offers a number of other features that can facilitate this vital aspect of database maintenance. In this tutorial, we will see how to apply this tool in practice.

I'll show an example of solving the problem of searching "similar" texts for one given text in big array using GiST index. The problem itself is not much important, but it is easy to understand. Using this problem as example, I'll show one of many methods of adapting GiST index for custom search problems. Maybe this talk will help you to solve other search problems.