After a four year hiatus, my participation in last week’s Percona Live MySQL Users conference marked my official return to the MySQL Community and Ecosystem. As with earlier renditions this year’s “UC” was very well attended with a healthy mix of familiar faces and new blood, all coming together to discuss, present and explore the boundaries of the most popular and widely used open source database on the planet.  There were many good, informative keynote and technical sessions, BoFs and the exhibit hall was packed most of the operating hours with those interested in what the MySQL ecosystem is up to.  I also found it very refreshing that Oracle was among the most active in presenting useful technical content around their current and future MySQL open source product releases. All in all, this year’s UC was very well done and as a Percona employee my …

A real fast list of stuff from the Percona Live 2014 event.

Yahoo’s Performance Analyzer

Yahoo is developing a MySQL performance analyzer that should be released as open source later this year. From the demo, it looks like it pulls in most of the MySQL metrics, shows you a processlist and then lets you drill into a processlist with explain. Will have to keep my eye out for this.

ChatOps with Hubot

GitHub’s Sam Lambert has a set of hubot chatops scripts for MySQL. I was already looking at depoying hubot for the ability to push messages from a remote source into an IRC channel, so this would be a natural fit. He also mentioned using Janky to tie CI with hubot.

DevOps at Outbrain

Shlomi …

The MySQL community continues to amaze me, everyone is friendly and always willing to answer questions and help others. It’s always nice to meet people in-person that I’ve met virtually in the last 12 months. Percona Live 2014 MySQL Conference and Expo in Santa Clara just wrapped up and I wanted to share my highlights of the event before I unplug for the weekend.

• I heard several stories of people’s experiences with TokuDB, open sourcing 12 months ago has been a huge success for Tokutek. We have a growing community in our tokudb-user Google Group, please share your experiences and help others.
• In his “Galera Cluster New Features” presentation, Sappo Jaakola of …

March 28, 2014 By Severalnines

Percona Live MySQL Conference & Expo - March 31st to April 4th

The Severalnines Team Will Be Onsite at Booth 418 - Come Say Hello!

If you’re still thinking about whether or not you should be attending the Percona Live MySQL Conference & Expo that starts on Monday 31st of March, here are 9 reasons (we are Severalnines after all) on why we’ll be there. May these help you positively in your decision making ;-)

1. The 2014 edition showcases the most promising program yet

Sounds like a cliché-reason to be listed here, but this year’s program is in fact quite diversified …

Recently, I have worked on one of this case where customer wanted to convert master-slave to master-master replication. They wanted to write on one master and keep another master as a hotspare. Many people are using this kind of environment with MySQL replication.

I would like to explain here in very simple steps that how we can do that. You can also follow the same steps if you want to promote only slave as a master in master-slave replication. Sometimes, this process will be helpful if you have master-slave replication and you want to rebuild or upgrade both the servers one by one. In that case, you have to shift traffic from one server to the other, take down the first server, rebuild it and then reverse the process.

I would also like to mention here that  master-master (active-active) replication is quite risky and it can lead to data inconsistency between the servers if writes are enable on both masters at the same time. …

Percona Toolkit has a great tool, pt-query-digest, that can use tcpdump data. Capturing raw tcp data can be taxing on a server, however, when you see the following message:

64000 packets received by filter
12000 packets dropped by kernel

When there is a significant amount of user cpu% being used, the kernel will drop packets you are trying to capture, leading to a partial picture and missing data. I’ve found that if you write it using the native tcpdump format, it’s more efficient and you drop less. There are also recommendations on Stack Overflow on how to help prevent this.

To perform a capture for a specific length of time, here’s the trick I …

Keynotes and Sessions:

Keynote: Getting Serious about MySQL and Hadoop at ContinuentRobert Hodges (CEO, Continuent) Hadoop for MySQL PeopleChris Schneider (Database Architect, Groupon.com) From Dolphins to Elephants: Real-Time MySQL to Hadoop ReplicationMC Brown (Director of Documentation, Continuent), Linas Virbalas (Senior Software Engineer, Continuent) Virtually Available MySQL, or How to

March 13, 2014 By Severalnines

Thanks to everyone who attended this week’s webinar; if you missed the sessions or would like to watch the webinar again & browse through the slides, they are now available online.

Special thanks to Seppo Jaakola, CEO at Codership, the creators of Galera Cluster, and to Johan Andersson, CTO at Severalnines, for their presentations and the live demo.

Webinar topics discussed: 

• Application use cases for Galera
• Schema design
• Events and Triggers
• Query design
• Migrating the schema
• Loading initial data into the cluster
• Limitations
• Performing Online Migration to Galera
• Operational management checklist
• Belts and suspenders: Plan B
• Demo

Watch the replay:

…

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 …

February 27, 2014 By Severalnines

Stockholm MongoDB User Group Meetup: “MongoDB and Hadoop” Monday, March 3, 2014 starting @ 5:00 PM

Join us next Monday as we host the Stockholm MongoDB User Group Meetup in Kista, or the Wireless Valley as it is also referred to. 

Our very own Vinay Joosery will be speaking about how to best automate the management & deployment of database clusters, specifically MongoDB clusters though the same principles apply for MySQL, MariaDB and Percona XtraDB based clusters. Henrik Ingo of MongoDB will be talking about Analytics with MongoDB & Hadoop. And Jim Dowling, a Senior Researcher at the Swedish Institute of Computer Science, will talk about a Hadoop PaaS platform. 

So whether you’re from the MySQL or NoSQL world, there’ll be plenty of good content here to walk away with in addition to …