Severalnines Blog
The automation and management blog for open source databases

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Online schema change with gh-ost - throttling and changing configuration at runtime

When performing schema changes online, it is important to be able to control the performance impact on our running databases. This blog post discusses gh-ost’s throttling mechanism. We will also cover the runtime configuration changes that gh-ost allows.

How to perform online schema changes on MySQL using gh-ost

This blog post shows you how to use GitHub’s gh-ost to perform an online schema change on a MySQL master-slave replication setup.

How to Perform Efficient Backup for MySQL and MariaDB

There are a number of ways to backup MySQL and MariaDB, each comes with pros and cons. An effective backup strategy will depend on the requirements of the business, the environment you operate in, and the resources at your disposal.

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Online schema change for MySQL & MariaDB - comparing GitHub’s gh-ost vs pt-online-schema-change

Online schema changes are a fact of life for any DBA. While there are tools to assist, for example, Percona’s pt-online-schema-change, it does not come without drawbacks. GitHub released a new online schema change tool called gh-ost. This post looks at how gh-ost compares to pt-online-schema-change, and how it can be used to address some limitations.

The choice of MySQL storage engine and its impact on backup procedures

MySQL offers multiple storage engines to store its data, with InnoDB and MyISAM the most popular ones. This has an impact on how you design and run your backup procedures.

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New whitepaper - the DevOps Guide to database backups for MySQL and MariaDB

Check out our free new whitepaper on database backups, which discusses in detail the two most popular backup utilities available for MySQL and MariaDB, namely mysqldump and Percona XtraBackup.

MySQL on Docker: Deploy a Homogeneous Galera Cluster with etcd

Our journey to make Galera Cluster run smoothly on Docker containers continues. Deploying Galera Cluster on Docker is tricky when using orchestration tools. With this blog, find out how to deploy a homogeneous Galera Cluster with etcd.

Become a MongoDB DBA: MongoDB Sharding Ins & Outs - Part 2

In our previous post, we showed you how to shard your MongoDB databases and covered the theory behind it. But you are not done yet. How do you monitor the shards to make sure they are performing, and that data is distributed evenly between your shards? And how do you consistently backup your data across shards? This is our ninth post in the “Become a MongoDB DBA” blog series.

Become a MongoDB DBA: MongoDB Sharding Ins & Outs - Part 1

This is our eighth post in the “Become a MongoDB DBA” blog series: how to scale writes with MongoDB.

Webinar Replay: Completing the MySQL Query Tuning Trilogy: working with optimizer & SQL tuning

This webinar was the third and last part of our webinar trilogy on MySQL Query Tuning, in which we discussed query tuning and related tools. In this trilogy we’ve covered SQL tuning, indexing, the optimizer and how to leverage EXPLAIN to gain insight into execution plans. Part 3 focussed on working with the optimizer and SQL tuning.