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Continuent Tungsten at SkySQL & Cloud Database Solutions Day, Friday 4/26

Join Continuent, SkySQL and MariaDB for a day of free tutorials and interactive discussions around the MySQL and Maria databases, the Cloud, and High Availability, immediately following Percona Live: MySQL User Conference and Expo 2013.

Robert Hodges (CEO, Continuent) and Edward Archibald (CTO, Continuent) will be talking about "Scalable MySQL Operation in the Cloud with Continuent Tungsten" at

Latest Addition to MySQL & Cloud Database Solutions Day: Calpont CTO Jim Tommaney joins as guest speaker

Join us next Friday in Santa Clara for a free day of learning and fun from the SkySQL & MariaDB gang & their partners

We’re proud to announce that Jim Tommaney, CTO of Calpont, has just signed on to speak at the MySQL & Cloud Database Solutions Day, hosted by SkySQL and MariaDB - taking place next Friday, April 26, directly after Percona Live: MySQL Conference & Expo.

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Latest Addition to MySQL & Cloud Database Solutions Day: Calpont CTO Jim Tommaney joins as guest speaker

Join us next Friday in Santa Clara for a free day of learning and fun from the SkySQL & MariaDB gang & their partners

We’re proud to announce that Jim Tommaney, CTO of Calpont, has just signed on to speak at the MySQL & Cloud Database Solutions Day, hosted by SkySQL and MariaDB - taking place next Friday, April 26, directly after Percona Live: MySQL Conference & Expo.

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MySQL User Group meeting June 4th in North Texas

Date: Tuesday, June 04, 2013
Time: 5:30 PM – 7:00 PM

Oracle Corporation
6031 Connection Drive
Suite 900
Las Colinas, TX 75039

Event is free to the public. But please RSVP so we order enough pizza.

Learn how to set up MySQL replication for simple master/slave relationship, including a live demo. Then we will cover how to scale using replication and advanced strategies. Giveaways include books from Oracle press!

Pizza at 5:30 p.m.
Presentation begins at 6:00 p.m.


How To: Storing and retrieving spatial data on MySQL server with Connector/Net

Spatial data is being more used and needed at a larger number of applications. This type of data is not always easy to be managed or queried. And sometimes calculations need to be done in the application code instead of doing them at the server. Recently we added a new class to manage spatial data with Connector/Net, so our users can have the option to handle spatial data operations at their application code.

MySQL Cluster 7.3 DMR2: Increasing Developer Flexibility and Simplicity

Highlights: Foreign Keys, NoSQL JavaScript Connector, MySQL 5.6 and Auto-Tuned Clustering
The MySQL team at Oracle are excited to announce the immediate availability of the second MySQL Cluster 7.3 Development Milestone Release (DMR)
Some might call MySQL Cluster 7.3 “the foreign keys release” – and sure enough it is a major engineering achievement to build a distributed database that enforces referential integrity across a shared-nothing cluster, while maintaining ACID compliance and cross-shard JOINs. But MySQL Cluster 7.3 is a lot more as well. 
The design focus has been on enabling developer agility – making it simpler and faster than ever to enhance new services with a highly scalable, fault tolerant, real-time database – with minimum development or operational effort. 
The key enhancements …

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MySQL Cluster Tutorial: NoSQL JavaScript Connector for Node.js

This tutorial has been authored by Craig Russell and JD Duncan

The MySQL Cluster team are working on a new NoSQL JavaScript connector for MySQL. The objectives are simplicity and high performance for JavaScript users:

- allows end-to-end JavaScript development, from the browser to the server and now to the world's most popular open source database

- native "NoSQL" access to the storage layer without going first through SQL transformations and parsing.

Node.js is a complete web platform built around JavaScript designed to deliver millions of client connections on commodity hardware. With the MySQL NoSQL Connector for JavaScript, Node.js users can easily add data access and persistence to their web, cloud, social and mobile applications.

While the initial …

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Disconnecting a replication slave is easier with MySQL 5.5+ (RESET SLAVE vs. RESET SLAVE ALL)

It’s not uncommon to promote a server from slave to master. One of the key things to protect your data integrity is to make sure that the promoted slave is permanently disconnected from its old master. If not, it may get writes from the old master, which can cause all kinds of data corruption. MySQL provides the handy RESET SLAVE command. But as we’ll see, its behavior has changed along with the MySQL versions and it’s easy to shoot yourself in the foot if you use it incorrectly. So how do you safely disconnect a replication slave?

In short

  • For MySQL 5.0 and 5.1, run STOP SLAVE, CHANGE MASTER TO MASTER_HOST='' and then RESET SLAVE.
  • For MySQL 5.5 and 5.6, run STOP SLAVE and then RESET SLAVE ALL.
  • For all versions, ban master-user, master-host and master-password settings in my.cnf, …
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Diagnosing problems with SQL imports

Importing a text file containing a list of SQL commands into MySQL is a straightforward task. All you need to do is simply feed the file contents through pipe into MySQL command line client. For example: mysql app_production < dump.sql.

The reasons for doing such imports can be very different - restoring MySQL backups created with mysqldump, manually replaying binary log events or performing database migrations during software roll-outs.

While the task is simple, the import may not end successfully and when this happens, how to tell what the problem was?

MySQL errors

Whenever database hits an error, MySQL produces an error message that describes the problem and the import process stops immediately. If the message is not clear enough, you can always refer to the reported line number, which is the line number inside the source SQL file. This way you can locate the precise command or query that …

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Percona XtraDB Cluster 5.5.30-23.7.4 for MySQL now available

Percona is glad to announce the release of Percona XtraDB Cluster 5.5.30-23.7.4 for MySQL on April 17, 2013. Binaries are available from the downloads area or from our software repositories.

New Features:

  • Percona XtraDB Cluster has implemented initial implementation of weighted quorum. Weight for node can be assigned via pc.weight option in the wsrep_provider_options variable. Accepted values are in the range [0, 255] (inclusive). Quorum is computed using weighted sum over group members.
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