MySQL Cluster Manager 1.4.0 is available for download from My Oracle Support.

More details are available in the the MCM 1.4.0 Release Notes.

Updated documentation is available here……

MySQL Cluster Manager 1.3.6 is available for download from My Oracle Support.

More details are available in the the MCM 1.3.6 Release Notes.

Updated documentation is available here.…

I recently hosted a webinar introducing MySQL Cluster and then looking into what’s new in the latest version (MySQL Cluster 7.4) in some more detail. The replay of the MySQL Cluster 7.4 webinar is now available here. Alternatively if just want to skim through the charts then scroll down.

Abstract

MySQL Cluster powers the subscriber databases of major communication services providers as well as next generation web, cloud, social and mobile applications. It is designed to deliver:

• Real-time, in-memory performance for both OLTP and analytics workloads
• Linear scale-out for both reads and writes
• 99.999% High Availability
• Transparent, cross-shard transactions …

I was rooting through past blog entries and I stumbled accross a draft post on setting up multi-master (update anywhere) asynchronous replication for MySQL Cluster. The post never quite got finished and published and while the material is now 4 years old it may still be helpfull to some and so I’m posting it now. Note that a lot has happened with MySQL Cluster in the last 4 years and in this area, the most notable change has been the Enhanced conflict resolution with MySQL Cluster active-active replication feature introduced in MySQL Cluster 7.2 and if you’re only dealing with a pair of Clusters, that’s your best option as it removed the need for you to maintain the timestamp columns and backs out entire transactions rather than just the conflicting rows. So when would you use this “legacy” method? The main use case is when you want conflict detection/resolution among a ring of more than …

The binary version for MySQL Cluster 7.3.2 has now been made available at http://www.mysql.com/downloads/cluster/ (GPL version) or Oracle’s Software Delivery Cloud for the commercial version.

A description of all of the changes (fixes) that have gone into MySQL Cluster 7.3.2 (compared to 7.3.1) is available from the 7.3.2 Change log.

MySQL Cluster 7.3 has now been declared GA! This means that you can deploy it in your live systems and get support from Oracle.

This post briefly describes the main new features in the release; for a deeper dive, refer to the What’s new in MySQL Cluster 7.3 white paper and the more specialised blog posts that you’ll find links to from this post.

I’ll also be giving more details in the MySQL Cluster 7.3 Webinar which is scheduled for 09:00 Pacific / Noon Eastern / 17:00 UK / 18:00 CET this Thursday (20th June). This is a great opportunity to get your questions answered in real-time by the experts. As …

Foreign Key constraints between tables

The newly announced GA of MySQL Cluster 7.3 (7.3.2) builds upon second DMR (7.3.1 m2) released earlier in the year which added Foreign Keys to MySQL Cluster. Foreign Keys is a feature requested by many, many people and has often been cited as the reason for not being able to replace InnoDB with MySQL Cluster when they needed the extra availability or scalability.

Note that this post is an up-version of the original – and was first published with the 7.3 labs release in June 2012.

What’s a Foreign Key

The majority of readers who are already familiar with Foreign Keys can skip to the next section.

Foreign Keys are a way of implementing relationships/constraints between columns in different tables. For example, in the above figure, we want to make sure …

FOSDEM 2013

The Free and Open source Software Developers’ European Meeting (FOSDEM) is a two-day event organized by volunteers to promote the widespread use of Free and Open Source software. As in previous years, there is a dedicated stream of MySQL Sessions. On Saturday (2nd Feb) evening there’s a MySQL community dinner and then we’ve a packed program from 9:15 through 17:30 on Sunday (3rd Feb).

FOSDEM 2013 is a free event and there’s no requirement to pre-register – just get yourself along to Brussels.

This year I’ll be making a presentation introducing MySQL Cluster. Several of my colleagues from …

Oracle have just announced that MySQL Cluster Manager 1.2 is Generally Available. For anyone not familiar with MySQL Cluster Manager – it’s a command-line management tool that makes it simpler and safer to manage your MySQL Cluster deployment – use it to create, configure, start, stop, upgrade…. your cluster.

So what has changed since MCM 1.1 was released?

The first thing is that a lot of work has happened under the covers and it’s now faster, more robust and can manage larger clusters. Feature-wise you get the following (note that a couple of these were released early as part of post-GA versions of MCM 1.1):

• Automation of on-line backup and restore
• Single command to start MCM and a single-host Cluster …

The binary & source versions for MySQL Cluster 7.1.23 have now been made available at https://www.mysql.com/downloads/cluster/7.1.html#downloads (GPL version) or https://support.oracle.com/ (commercial version).

A description of all of the changes (fixes) that have gone into MySQL Cluster 7.1.23 (compared to 7.1.22) are available from the 7.1.23 Change log.