Yesterday someone opened a Launchpad question asking "is Drizzle dead?".  I have answered that question on Launchpad but wanted to blog about it to give a bit of background context.

As I am sure most of the people who read this know, Drizzle is an Open Source database which was originally forked from the alpha version of MySQL 6.0.  At the time it was an extremely radical approach to Open Source development, many features were stripped out and re-written as plugins to turn it into a micro-kernel style architecture.  Every merge request was automatically throughly tested on several platforms for regressions, memory leaks and even positive/negative performance changes.

In fact Drizzle has influenced many Open Source projects today.  Openstack's Continuous …

Will be giving a lightning talk at Percona Live 2014 – santa clara :)

In the world of replication, The Binlog is every ones favorite. 

But what about the Relay log, Don't you feel it can do more ?

Yes, It can. How about, if it can serve the purpose of the GTID 

feature without GTID.

https://www.percona.com/live/mysql-conference-2014/sessions/relay-log-unsung-hero

#MySQL  ( alternative to GTID )  #gtid

I spoke last month at linux.conf.au 2014 in Perth, Australia, and one of my sessions focused on the “Continuous Integration (CI) testing of Percona XtraDB Cluster (PXC)” at the Developer,Testing, Release and CI miniconf.

Here is the video of the presentation:

Here is the presentation itself:

Percona XtraDB Cluster before every release: Glimpse into CI testing from Raghavendra PrabhuBelow is a rough transcript of the talk:

This talk covered the continuous integration testing of the Galera cluster; specifically, Percona XtraDB Cluster (PXC), based on Galera, is taken into …

This week we released MySQL Connector/Python v1.1.6 has been released with a fix for the Django backend. If you  wonder (or not?) where Connector/Python v1.1.5, it got released a few weeks ago. Yes, PyPi has been updated! Don’t forget to use –allow-external using newest pip.

Some useful links:

• Documentation: http://dev.mysql.com/doc/connector-python/en/index.html
• Release Notes:  …

I blogged a couple of weeks ago about my upcoming MySQL/Hadoop talk at SCaLE 12X. Unfortunately I had to cancel. A few days after writing the article I came down with an eye problem that is fixed but prevents me from flying anywhere for a few weeks. That's a pity as I was definitely looking forward to attending the conference and explaining how Tungsten replicates transactions from MySQL into HDFS.

Meanwhile, we are still moving at full steam with Hadoop-related work at Continuent, which is the basis for the next major replication release, Tungsten Replicator 3.0.0. Binary builds and documentation will go up in a few days. There will also be many more public talks about Hadoop support, starting in April at …

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on February 20th 2014. Binaries are available from downloads area or from our software repositories.

Based on Percona Server 5.6.15-63.0 including all the bug fixes in it, Galera Replicator 3.3 and on Codership …

Lets start by considering a scenario where records are being inserted in a single auto-increment table via different nodes of a multi-master cluster. One issue that might arise is ‘collision’ of generated auto-increment values on different nodes, which is precisely the subject of this article.

As the cluster is multi-master, it allows writes on all master nodes. As a result of which a table might get same auto-incremented values on different nodes on INSERTs. This issue is discovered only after the writeset is replicated and that’s a problem!

Galera cluster suffers with the similar problem.

Lets try to emulate this on a 2-node Galera cluster :

1) On node #1:

MariaDB [test]> CREATE TABLE t1(c1 INT AUTO_INCREMENT PRIMARY KEY, c2 INT)ENGINE=InnoDB;
Query OK, 0 rows affected (0.07 sec)

MariaDB [test]> START TRANSACTION;
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> INSERT INTO t1(c2) VALUES (1);
Query …

The Percona Cloud Tools beta service continues to grow its query analysis capabilities with new features for reviewing queries. These enhancements will:

• Provide better visibility into the query performance of your next code deployment
• Introduce query organization tools for efficiency
• Foster better collaboration in teams

Join the hundreds of other users who are using Percona’s MySQL expertise and Percona Cloud Tools to improve the performance of their applications. Of course, it’s free during the beta.

What’s newQuery Review

Query Review gives you the right resources to efficiently review your application’s most important database activities. New tools enable you to assess, categorize, and comment on each of your application’s queries.

…

Zyme, based in Redwood Shores, California, is the global leading provider of Channel Data Management (CDM) solutions to companies selling through indirect channels. For high tech and consumer electronic products alone, over $1 trillion USD worth of goods are flowing through those indirect sales channels every year. However, when companies sell products through multi-tier channel partners and retailers around the world, it has proven to be challenging in acquiring global, standardized channel inventory and sales data cost-effectively. As a result, companies lacking of such critical information often miss the opportunities to make timely and accurate business decisions either to increase revenue, reduce costs or to prevent losses.

Having a vision to solve such channel visibility problems for customers including Symantec, Logitech, Seagate and Xerox, Zyme built its channel data …

Today’s post features an interview with Morgan Tocker, MySQL community manager at Oracle. Morgan is an old friend of Percona, having worked here as director of MySQL training from 2009 to 2011. He’s also done stints at MySQL, Sun Microsystems and InPowered. You can follow his adventures at his blog, “Master MySQL.”  You can also connect with him face-to-face at the Percona Live MySQL Conference and Expo this April 1-4 in Santa Clara, Calif.  Use the promotional code “SeeMeSpeak” on the registration page and save 10 percent.

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