Severalnines Blog
The automation and management blog for open source databases

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612 blog posts in 13 categories

More of My Favorite PostgreSQL Queries - and Why They Also Matter

This is the follow up to the popular blog ‘My favourite PostgreSQL queries and why they matter’. This new blog focusses on a particular query, multi-row UPDATE with a single CASE expression, and makes comparisons between that particular query, and one involving multiple single UPDATE statements.

ClusterControl Release 1.6.2: New Backup Management and Security Features for MySQL & PostgreSQL

This blog provides an overview of the new Backup Management and Security & Compliance features for MySQL & PostgreSQL in the ClusterControl 1.6.2 release.

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How to Control Replication Failover for MySQL and MariaDB

Automated failover is a critical functionality in a MySQL or MariaDB replication setup, involving master-promotion and reslaving. Now, not all slaves are good master candidates, so how do you control which node gets picked? This blog introduces whitelists and blacklists.

How to perform Schema Changes in MySQL & MariaDB in a Safe Way

This blog describes best practices to make your database schema changes in MySQL and MariaDB flawless. We will walk you through different scenarios and recomment some approaches for each.

Custom Trigger Based Upgrades for PostgreSQL

This blog provides an overview of custom trigger based upgrades for PostgreSQL; and some insight into how computer game strategies can be lessons for database administration life.

Galera Cluster Recovery 101 - A Deep Dive into Network Partitioning

Galera automatic node provisioning and membership control simplifies database cluster operation and improves the reliability of its replication technology. In this blog post, we are diving into the Galera recovery process in events where network partitioning happens.

How to Recover MySQL Galera Cluster from an Asynchronous Slave?

What do you do if you lose your Galera Cluster? A simple solution is to failover to an asynchronous slave. The slave would immediately serve up-to-date data to applications, with minimal downtime. But then, with the slave being the new source of truth, how do you recover your Galera Cluster?

PostgreSQL Log Analysis with pgBadger

pgBadger is a PostgreSQL log analyzer, it takes the log output from a running PostgreSQL instance and processes it into an HTML file. The report it generates can help shed light on errors happening in the system, checkpoint behavior, vacuum behavior, trends, and other basic, but crucial information for a PostgreSQL system. This blog provides an overview of pgBadger, as well as how to get the most out of it.

Integrating Tools to Manage PostgreSQL in Production

As a follow up to the popular blog “Ten Tips for Going into Production with PostgreSQL”, this blog explores the different types of tools you would need to effectively run a PostgreSQL instance in a production environment.

Planning & Managing Schemas in MongoDB (Even Though It’s Schemaless)

This blog provides a high-level overview of implementing and managing schemas for MongoDB, even though the technology itself advertises itself a schemaless technology.