This article is the second in a two-part series on upgrading MySQL.  The first article, Upgrade from 5.0 directly to 5.7 using mysqldump, discussed performing an upgrade using the mysqldump utility.  We call that a ‘Dump’ Upgrade.  In this article, we will discuss what we call an ‘In Place’ Upgrade, also known as a Binary Upgrade or a Live Upgrade.…

Upgrading MySQL

NOTE: This blog is an updated version of the previously published blog, Upgrading Directly From MySQL 5.0 to 5.6 With mysqldump, modified for upgrading to 5.7.

Upgrading MySQL is a task that is almost inevitable if you have been managing a MySQL installation for any length of time.…

A key theme of the MySQL Server 5.7 release is much improved security. Earlier releases of MySQL 5.7 have introduced features supporting this initiative including automatic generation and detection of TLS key material and client-side preference for TLS connections. The recent MySQL 5.7.8 release builds upon this and provides additional monitoring and audit capabilities that make it easy to answer the question: “How secure are my client connections?”.…

With the shipment of the first release candidate (RC) of MySQL 5.7, the next major version of the server is rapidly shaping up. Over the course of the nearly two and a half years that have passed since 5.6 went GA, we have put a lot of work into streamlining the server code in order to ease the burden of developing and maintaining such a large product and codebase.

An important aspect of this work is deprecation and removal. To explain the terms, deprecating a feature means that we signal to the outside world that “this feature is available now, but it will be removed in a future release, so please adjust your use case accordingly”. Removing a feature means just that – in one version the feature is available, but then it is gone, and if you try to use it, you will get an error message saying that the feature is unknown.

Generally we don’t remove features in existing GA releases, but we …

Upgrading MySQL

Upgrading MySQL is a task that is almost inevitable if you have been managing a MySQL installation for any length of time. To accomplish that task, we have provided a utility and documentation to upgrade from one version of MySQL to another. The general recommendation is to perform the upgrade by stepping from one major release to the next, without skipping an intermediate major release. For example, if you are at 5.1.73, and you want to go to 5.6.24, the safest and recommended method is to upgrade from 5.1.73 to 5.5.43 (the latest 5.5 release at the time of this writing), and then upgrade from 5.5.43 to 5.6.24 (or any version of 5.6). This allows the …

In the MySQL team, we have always had a requirement to support upgrades from one major version. For example:

• Upgrading from MySQL 5.5 to 5.6 is supported.
• Upgrading from MySQL 5.1 to 5.6 is not supported.

Downgrades are also supported for one major version. For example, if a user upgrades to 5.6 but discovers that it is not working as expected, they have the safety knowing that there is a way to step back to MySQL 5.5. This may come with some limits; for example when new features (such as new row formats or page checksums) are enabled, this may no longer be possible.

Today I wanted to discuss a current non-requirement. We do not support skipping major versions, such as upgrading from MySQL 5.1 to 5.6. Justin however makes the …

September 3, 2014 By Severalnines

Running your database cluster on AWS is a great way to adapt to changing workloads by adding/removing instances, or by scaling up/down each instance. At Severalnines, we talk much more about scale-out than scale up, but there are cases where you might want to scale up an instance instead of scaling out. 

In this post, we’ll show you how to change instance sizes with respect to RAM, CPU and IOPS, and how to tune your Galera nodes accordingly. Moreover, this post assumes that instances are launched using Amazon VPC.

When do we need to upgrade an instance?

You typically need to upgrade an instance when you run out of server resources. This includes CPU, RAM, storage capacity, disk throughput and bandwidth. You must allow enough headroom for …

As MySQL 5.6 now enables the SQL Mode STRICT_TRANS_TABLES for new installations, I have been running into users who have been upgrading from previous versions, and not quite sure how to test their application for compatibility with this new default.

For some applications converting warnings to errors presents an unknown-unknown, in that the operators of the system can not easily detect what may break. Certainly many deployments will have QA environments, but there is always some fear production queries are just a little bit different.

Since sql_mode is configurable on a per-session basis, there are some strategies that I have been recommending to ease transition:

• Whitelist: Have all new application components enable strict mode by default. For example, if you are building a set of cron jobs to rebuild caches of data …

April 22, 2014 By Severalnines

Join our upcoming webinar New Features Webinar on ClusterControl 1.2.6 - May 13th 2014 with live demo. Click on following banner to register:

The Severalnines team is pleased to announce the release of ClusterControl 1.2.6. This release contains key new features along with performance improvements and bug fixes. We have outlined some of the key features below. 

Highlights of ClusterControl 1.2.6 include:

• Centralized Authentication using LDAP or Active Directory
• Role-Based Access Control 
• OpenStack: Galera Deployment Automation
• Hybrid setups with Galera and Asynchronous MySQL Replication
• Manage multiple Galera …

March 5, 2014 By Severalnines

The Severalnines team is pleased to announce the release of ClusterControl 1.2.5. This release contains key new features along with performance improvements and bug fixes. We have outlined some of the key features below. 

For additional details about the release:

• 1.2.5 ChangeLog
• Documentation
• Upgrading
  • Upgrade instructions
  • Blog that covers different upgrade scenarios …