Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on September 21st 2015. Binaries are available from downloads area or from our software repositories.

Based on Percona Server 5.6.25-73.1 including all the bug fixes in it, Galera Replicator 3.12, and on …

Even with software like Percona Xtrabackup, logical backups remain an important component of a thorough backup strategy. To gather a logical backup in a timely fashion we rely on a tool called mydumper. In the Percona Managed Services department we’re lucky enough to have one of the project’s most active contributors and many of the latest features and bug fixes have been released to satisfy some of our own use cases. Compiling mydumper remains one of my personal bug bears and undoubtedly the highest barrier to entry for many potential adopters. There are a few conditions that make compiling it difficult, tiring or even prohibitive. The open source logical backup tool does not supply any official packages, however our friends over at …

Having secured our MySQL server and created a personal account to allow for remote administration, we can take one step further on blocking unwanted access to our database server. For this example, we'll continue to use the Ubuntu 14.04.2 LTS Server installed and configured on the previous posts. After booting up the server, running a network check for connections, lists our server listening on

I am also getting this error when i create above soft links,
radiusd: #### Instantiating modules ####
/usr/local/etc/raddb/mods-enabled/redis[10]: Failed to link to module ‘rlm_redis’: /usr/local/lib/rlm_redis.so: cannot open shared object file: No such file or directory

This post was written by Seppo Jaakola, CEO of Codership.

There appears to be great misunderstanding as to what MySQL transaction isolation levels Galera CLuster actually supports and how. This blog post tries to give answer to those uncertainties.

Galera Cluster provides SNAPSHOT ISOLATION between transactions running on separate cluster nodes. Transactions running on the same node are isolated by whatever was configured as the transaction isolation level in the MySQL configuration. So, if you have configured the default REPEATABLE READ isolation, transactions issued on the same node will behave under REPEATABLE READ semantics. However, for transactions issued on separate cluster nodes, the ‘first committer wins’ rule of SNAPSHOT ISOLATION is provided, and this will fix the lost update problem that generally hurts REPEATABLE READ isolation.

Therefore, it is not safe for the application to rely on SNAPSHOT …

I installed the MariaDB 10.1 Release Candidate. Nothing interesting happened, which from MariaDB's point of view is good. But here's how I tried to make it interesting. Some of this applies to late releases of MariaDB 10.0 as well.

Loop with MAKE INSTALL

My habit is to download the source to directory X and then say "cmake -DCMAKE_INSTALL_PREFIX=/X" (the same directory), then "make", then "make install". That doesn't work any more. Now I can't install in the same directory that I downloaded in. Not a big deal; perhaps I'm the only person who had this habit.

Crash with ALTER

In an earlier blog post General Purpose Storage Engines in MariaDB I mentioned a crash, which I'm happy to say is fixed now. Here's another way to crash, once again involving different storage engines.

Welcome to the …

On Monday 21 September Percona Live will start in Amsterdam.

The program is full of interesting topics and I am sure a lot of great discussions will follow.

I whish all my best to all my colleagues, friends and customers that will attend it. Have fun guys and drink a couple of beer for me as well.

That is it, I had decided to do not submit speech(es) and to do not come this year, not only to Percona Live but to most or all the conferences.

I want to stay focus on my customers for now, and be present as much as I can for my teammates.

We have so much going on that an effort in that direction must be done, and the few time left ... well I have to read a lot of intersting stuff not Tech related.

So have fun, learn, teach, listen and talk ... but on top of all share and …

On Monday 21 September Percona Live will start in Amsterdam.

The program is full of interesting topics and I am sure a lot of great discussions will follow.

I whish all my best to all my colleagues, friends and customers that will attend it. Have fun guys and drink a couple of beer for me as well.

That is it, I had decided to do not submit speech(es) and to do not come this year, not only to Percona Live but to most or all the conferences.

I want to stay focus on my customers for now, and be present as much as I can for my teammates.

We have so much going on that an effort in that direction must be done, and the few time left ... well I have to read a lot of intersting stuff not Tech related.

So have fun, learn, teach, listen and talk ... but on top of all share and …

The MySQL team are busily working on improving ways to use MySQL in scalable highly available systems. As most of you are already aware, the MySQL Group Replication project is progressing at full speed. Indeed, we just got preview release 0.5 out, while Fabric 1.5.6 was just released and work is ongoing for the Fabric 1.6 release.…

There are at least three issues with the catalog URL rewrite indexer and URL rewrite management in Magento:

• A reindex will add a new rows for products with duplicate url_key's - every single time you reindex
• Disabled products generate new rows
• Products that are not-visible individually generate new rows

Core bug

I’m pretty late to the party, but decided to investigate it anyway since I have to deal with many stores whose indexers get stuck because of various SQL errors related to the URL rewrite index and whose tables are way too big and out of proportions for the amount of categories and products they have.

This bug will make your table grow into the millions of rows and hundreds of …