Kaj just announced that as of 5.1.25, MySQL Cluster will no longer be included in the normal MySQL packages. Instead, a new branch is being created for MySQL Cluster releases, where the first release is informally called “6.2.15″ but the releases are really named “mysql-5.1.23-ndb-6.2.15″. This new branch is based on the MySQL Cluster Carrier Grade Edition of MySQL.

Overall, this seems like a good idea — the needs for releases, schedules, pressures, etc., are at odds between MySQL Cluster and MySQL’s core. I am, however, baffled by the decision of how to release the new product: coupled with MySQL as a single monolithic package with compiled-in storage engine. After all, 5.1 has long been touted to have this amazing new …

MySQL’s version numbering is getting harder and harder to understand. In fact, it’s getting surreal.

Let me state up front that there’s probably a lot I don’t know here. But if I don’t know, how on earth can the general public figure it out?

Before we begin, let’s define terms: GA is completely done, ready for use. RC is a release candidate: don’t change anything, just fix bugs because we’re charging towards a release here. Beta is possibly unsafe code, use at your own risk. Alpha is known to have significant bugs, but if you’re curious please play with it.

Now for the releases/versions game. Let’s recap:

• 5.0 has version numbers that leapfrog each other in features and functionality. SHOW PROFILES — now you see it, now you don’t.
• 5.1 has been “… released to general …

On Monday this week I attended the first day of the Ubuntu Developer Summit in Prague.  The summit which just ended today, was intended to drive plans and decisions for the next Ubuntu release "Intrepid Ibex" which is due out on October 30th.  (Check out the reports from the summit here.)

Mark welcomes the masses while Jono scans the crowd for hecklers.

Sun had about 12 folks there representing GlassFish, Open JDK, NetBeans, Hudson, …

I've run some data load tests with various databases using DBMonster, so connecting to databases through JDBC on a WindowsXP personal computer.Here are the results, in both cases I loaded 100 rows in the parent table and 1000 in the child table, with foreign keys enabled.Firebird 2.1 with Jaybird 2.1.3 and DBMonster 1.0.3 (And Java .6)Table structure is:CREATE TABLE GUYS(GUY_ID Integer NOT NULL,

The Certified MySQL Associate Exam is a general overview of the MySQL database. It is designed for those new to databases and/or MySQL.

The subject of transactions has caused a few folks to stumble on their exams. For someone with a background in programming where you change data and it stays that way, transactions take a little effort to understand.

The usual example is a payment at a bank. A pays B 100 units. If something happens between the time the system takes the 100 out of A's account and puts it into B's account, there is a large chance that both A and B will not be happy. So the subtract 100 and add 100 are treated as one unit and either both have to be completed as a unit or not at all.


So all or nothing.

You type START TRANSACTION, input the needed changes, and COMMIT. And your changes are done as one to your database. Or half way through you realize that something is …

I've been reading a few blog postings such as Kore Nordmann's ActiveRecord sucks and Mike Seth's ActiveRecord sucks, but Kore Nordmann is wrong.ActiveRecord is fine.  It is a tool that does just what it's designed to do.  What sucks is when developers try to make it do other things than what it's intended to do.I worked for Zend, managing the Zend Framework project through its 1.0 release.  I

The upcoming 5.1.25 release will see a change with regards to MySQL Cluster:

MySQL 5.1.25 binaries will be released without Cluster support.

This is due to a change in the development cycle of MySQL Cluster. The work on Cluster specific features is largely independent from the rest of the MySQL Server, which has resulted in our decision to release MySQL Cluster separately from the rest of the MySQL Server, effective with MySQL 5.1.25.

This change just goes for the binaries, though. Let me reassure you that:

• Sun is still releasing MySQL Cluster under the GPL, as before.
• MySQL 5.1 source code will still include Cluster, and you can download and compile it with …

I have written a Configuration Tool for MySQL Cluster.
It is located on www.severalnines.com/config

The configuration tool lets you:

• Configure a Cluster based on MySQL Cluster 6.2 or MySQL Cluster 6.3
• The number of data nodes, mysqlds, and management servers
  
• Chose how much DataMemory to allocate for the data nodes
• Specify on which hosts to install the software on etc etc

Finally, configuration files (config.ini and my.cnf) and a set of scripts are generated based on your input and emailed to you.

With those scripts you can then:

• Download and compile 6.3
• Distribute the Cluster binaries onto the hosts you have specified)
  
• Bootstrap the system (create directories, mysql user account, install mysql database, configuration …

I have finally publicly released Federated ODBC Storage Engine, something I did most of the development for last year, then became extremely busy with work and other projects. I have heard of interest for this engine from several people, and I really enjoyed working on this project as it enables having a storage engine that can actually connect to a variety of data sources.

Last year I was able to connect it to a PostgreSQL table, but ran into a lot of headaches trying to get other RDBMS ODBC drivers working with it. A lot of the problem is that I need to make the SQL statements the storage engine builds very standard. I had to revert the code a bit to get it to work with the latest MySQL 5.1.21, so I lost some of that work to make the SQL generic. The other issue is that to test with other databases, you need to be somewhat fluent in setting up each one and getting it's ODBC driver working correctly, which takes time away from …

The 98th edition of Log Buffer, the weekly review of database blogs, has been published on Jeff’s SQL Server Blog.

Log Buffer is a shared project of the DBA blogging community, so you’re welcome to edit and publish an edition yourself. LB’s 100th anniversary edition is still up-for-grabs (and there’s plenty of room besides that), so read the Log Buffer homepage and the guidelines, and then email me.

Here’s Jeff Smith’s …