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Hardware Planning

What does high availability mean? In the context of what we're trying to build, it means we want our database to start and remain online for as long as possible. A critical component of this is the hardware that hosts the database itself. No matter how perfect a machine and its parts may be, the failure, of or unexpected behavior from, any element can result in an outage.

So how do we avoid these unwanted outages? We expect them. We must start by assuming hardware can and will fail, and at the worst possible moment. If we start with that in mind, it becomes much easier to make decisions regarding the composition of each server we are building.

Make no mistake! Much of this planning will rely on worksheets, caveats, and compromise. Some of our choices will have several expensive options, and we will have to weigh the benefits offered against our total cost...

Key benefits

Newly updated edition, covering the latest PostgreSQL 12 features with hands-on industry-driven recipes

Create a PostgreSQL cluster that stays online even when disaster strikes

Learn how to avoid costly downtime and data loss that can ruin your business

Description

Databases are nothing without the data they store. In the event of an outage or technical catastrophe, immediate recovery is essential. This updated edition ensures that you will learn the important concepts related to node architecture design, as well as techniques such as using repmgr for failover automation. From cluster layout and hardware selection to software stacks and horizontal scalability, this PostgreSQL cookbook will help you build a PostgreSQL cluster that will survive crashes, resist data corruption, and grow smoothly with customer demand. You’ll start by understanding how to plan a PostgreSQL database architecture that is resistant to outages and scalable, as it is the scaffolding on which everything rests. With the bedrock established, you'll cover the topics that PostgreSQL database administrators need to know to manage a highly available cluster. This includes configuration, troubleshooting, monitoring and alerting, backups through proxies, failover automation, and other considerations that are essential for a healthy PostgreSQL cluster. Later, you’ll learn to use multi-master replication to maximize server availability. Later chapters will guide you through managing major version upgrades without downtime. By the end of this book, you’ll have learned how to build an efficient and adaptive PostgreSQL 12 database cluster.

What you will learn

Understand how to protect data with PostgreSQL replication tools

Focus on hardware planning to ensure that your database runs efficiently

Reduce database resource contention with connection pooling

Monitor and visualize cluster activity with Nagios and the TIG (Telegraf, In?uxDB, Grafana) stack

Construct a robust software stack that can detect and avert outages

Use multi-master to achieve an enduring PostgreSQL cluster

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