September 9, 2014 By Severalnines

We are excited to announce the availability of YUM/APT repositories for ClusterControl, making new releases of ClusterControl  easily accessible using YUM or APT package managers. The repo is found at http://repo.severalnines.com, with instructions provided on the landing page. Our Cluster Configurators will be using these repositories. As a result, users upgrading from s9s_upgrade_cmon starting from version v.1.2.8 will be configured with the package repository.

ClusterControl requires extra post-installation setup steps, such as generating an API token, configuring cmon/dcps database schema, grant privileges on cmon schema, setting up SSL and so on. We provide a post-installation script for this purpose at [Apache document …

Daniel was tracking down what appeared to be a networking problem….

• server reported 113 (No route to host)
• However, an strace did not reveal the networking stack ever returning that.
• On the other side, IP packets were actually received.
• When confronted with mysteries like this, I get suspicious – mainly of (fellow) programmers.
• I suggested a grep through the source code, which revealed  return -EHOSTUNREACH;
• Mystery solved, which allowed us to find what was actually going on.

Lessons:

1. Don’t just believe or presume the supposed origin of an error.
2. Programmers often take shortcuts that cause grief later. I fully appreciate how the above code came about, but I still think it was wrong. Mapping a “similar” situation onto an existing …

Download MariaDB Galera Cluster 10.0.13

Release Notes Changelog What is MariaDB Galera Cluster?

MariaDB APT and YUM Repository Configuration Generator

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.13. This is a Stable (GA) release.

See 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 …

I have a difficult task of making this post interesting, helpful and personal at the same time. I think the main goal is to balance these aspects, and I really appreciate your comments and suggestions that I will add here. For the busy readers who may be put off by the length of this post, here is a very short summary: I spent 4 wonderful years, first as the head of Field Services, then as a CTO, I believe it is now time for a change, so I am leaving SkySQL. I am leaving behind a great company and very good friends, but I am not disappearing completely, and I will continue supporting the work I started and the projects I created with the help of such great people. For many, leaving a company is not easy, and it is extremely difficult if you have contributed to its creation and development since the beginning. Even more difficult is to depart from ideas and projects that you have shaped and …

September 1, 2014 By Severalnines

According to Forrester, a DBA in a large enterprise manages between 8 and 275 databases, with the industry average being 40 databases to a DBA. Larger databases usually require extra effort around tuning, backup, recovery and upgrade. Cloud, as well as automation and management tools can help improve the number of databases managed by one DBA.  

With that background, we were pretty excited to introduce support for management of single-instance MySQL and MariaDB databases in ClusterControl 1.2.6. The majority, if not all of the cluster users out there, use single-instance or master-slave replicated setups along their mission-critical …

August 28, 2014 By Severalnines Check Out Our Latest Resources for MySQL, MariaDB & MongoDB Clusters

Here is a summary of resources & tools that we’ve made available to you in the past weeks. If you have any questions on these, feel free to contact us!

New Technical Webinars

Performance Tuning of HAProxy for Database Load Balancing

09 September 2014 - with Baptiste Assmann of HAProxy Technologies

Do you know what HAProxy can tell you about your application and database instances? Do you know the difference …

August 25, 2014 By Severalnines

Are you going in production with Galera Cluster for MySQL? Here are 9 tips to consider before going live. These are applicable to all 3 Galera versions (Codership, Percona XtraDB Cluster and MariaDB Galera Cluster). 

1. Galera strengths and weaknesses

There are multiple types of replication and cluster technologies for MySQL, make sure you understand how Galera works so you set the right expectations. Applications that run on single instance MySQL might not work well on Galera, you might need to make some changes to the application or the workload might not be appropriate. We’d suggest you have a look at these resources: 

• Tutorial on …

Download MariaDB Galera Cluster 5.5.39

Release Notes Changelog What is MariaDB Galera Cluster?

MariaDB APT and YUM Repository Configuration Generator

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 5.5.39. This is a Stable (GA) release.

See the …

August 21, 2014 By Severalnines

MariaDB Galera Cluster involves more effort and resource to administer than standalone MariaDB systems. If you would like to learn how to better manage your MariaDB cluster, then this webinar series is for you. 

We will give you practical advice on how to introduce clusters into your MariaDB / MySQL  environment, automate deployment and make it easier for operational staff to manage and monitor the cluster using ClusterControl.

Language, Date & Time: 

English - Tuesday, September 30th @ 11am CEST: …