May 23, 2014 By Severalnines

If you need to deploy a database cluster behind your corporate firewall, on servers with no internet access, then this blog is for you. Most of the installation tutorials out there require servers to have an internet connection, and that would not work very well with companies under strict policies and compliance guidelines. 

Our online Galera Configurator supports deployment without Internet connection for Percona XtraDB Cluster. You would need to prepare a minimum of four hosts (three DB nodes and one management node), generate a Deployment Package from the Configurator and copy it to the ClusterControl host. In this post, we will show you how to deploy Percona XtraDB Cluster 5.5 in an environment without internet connection on CentOS 6.5 (installed with minimal installation). Our setup is …

I’ve had the opportunity to train lots of people on Percona XtraDB Cluster (PXC) over the last few years the product has existed.  This has taken the form of phone calls, emails, blog posts, webinars, and consulting engagements. This doesn’t count all the time I’ve spent grilling Codership on how things actually work.  But it has culminated in the PXC tutorial I have given annually at Percona Live MySQL Conference and Expo in Santa Clara, California for the last two years.  Baron even attended this year and had this say:

“Jay Janssen’s tutorial on Percona …

Percona is glad to announce the release of Percona XtraDB Cluster 5.5.37-25.10 on May 8, 2014. Binaries are available from the downloads area or from our software repositories.

Based on Percona Server 5.5.37-35.0 including all the bug fixes in it, Galera Replicator 2.10 (including fixes in 2.9 and 2.10 milestones) and on wsrep API 25.10 (including fixes in 25.10), Percona XtraDB …

Overview

Percona XtraDB Cluster 5.6 has been GA for several months now and people are thinking more and more about moving from 5.5 to 5.6. Most people don’t want to upgrade all at once, but would prefer a rolling upgrade to avoid downtime and ensure 5.6 is behaving in a stable fashion before putting all of production on it. The official guide to a rolling upgrade can be found in the PXC 5.6 manual. This blog post will attempt to summarize the basic process.

However, there are a few caveats to trying to do a rolling 5.6 upgrade from 5.5:

1. If you mix Galera 2 and Galera 3 nodes, you must set wsrep_provider_options=”socket.checksum=1″ on the Galera 3 nodes for backwards …

Whither your rollback plan?

MySQL 5.6 upgrades are in full swing these days and knowing how to safely upgrade from MySQL 5.5 to 5.6 is important. When upgrading a replication environment, it’s important that you can build a migration plan that safely allows for your upgrade with minimal risk — rollback is often a very important component to this.

For many people this means upgrading slaves first and then the master.  The strategy of an older master replicating to a newer slave is well known and has been supported in MySQL replication for a very long time.  To be specific:  you can have a MySQL 5.6 slave of a 5.5 master and this should work fine until you upgrade your master and/or promote one of the slaves to be the master.

However, there are those of us who like to live on the edge and do …

I’d like to congratulate Canonical with the new Ubuntu 14.04 LTS (Trusty Tahr) Release, it really looks like a great release, and I say it having my own agenda It looks even more great because it comes with a full line of Percona Software.
If you install Ubuntu 14.04 and run aptitude search you will find:

• Percona Toolkit
• Percona XtraBackup
• Percona XtraDB Cluster
• Percona Server (as part of Percona XtraDB Cluster installation)

Percona Toolkit and …

210 people registered for the inaugural “Open Source Appreciation Day” March 31 in Santa Clara, Calif. The event will be held each year at Percona Live henceforth.

To kick off the Percona Live MySQL Conference & Expo 2014, Percona held the first “Open Source Appreciation Day” on Monday, March 31st. Over 210 people registered and the day’s two free events focused on CentOS and OpenStack.

The OpenStack Today event brought together members of the …

In my last blog post I explained how to use Percona ClusterControl to create a new Percona XtraDB Cluster from scratch. That’s a good option when you want to create a testing environment in just some mouse clicks. In this case I’m going to show you how to add your existing cluster to Percona ClusterControl so you can manage and monitor it on the web interface.

The environment will be pretty similar, we will have UI, CMON and 3 XtraDB Cluster nodes. The cluster should be already running and Percona ClusterControl also installed.

Adding an existing Cluster

The ClusterControl web interface is empty, there are no clusters on it. To add an existing one …

Percona Server 5.6.11-60.3 introduces a new “log archiving” feature. Percona XtraBackup 2.1.5 supports “apply archived logs.” What does it mean and how it can be used?

Percona products propose three kinds of incremental backups. The first is full scan of data files and comparison the data with backup data to find some delta. This approach provides a history of changes and saves disk space by storing only data deltas. But the disadvantage is a full-data file scan that adds load to the disk subsystem. The second kind of incremental backup avoids extra disk load during data file scans.

The idea is in reading only changed data pages. The information about what specific pages were changed is provided by the server itself which …

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:

…