CRIB is a CentRal Information Base for MySQL, a long time coming project since I worked on it on and off for a few weeks and now I decided it’s time to hand it over to the global MySQL community.

So, what is CRIB?

CRIB is a central database which collects information about all your MySQL instances which you set as clients. It is monitoring in a way, but not the typical number of connections, memory, index usage, table scans, cpu usage and such, but rather consists of a repository where, if you have tens, hundreds or even thousands of clients, you can see where a particular user was created, where a certain database name features or which tables does a database consists of. It also features a script which logs table sizes periodically (customizable) so you can graph disk usage over time and be able to forecast future disk space requirements easily.

Download the latest code with: bzr branch lp:crib

First …

I’ve started a little series on how to migrate your MySQL applications and databases over to CouchDB. Most of the process is about how you think about your data, not about the database itself, the application, or the interface to the database storage. There are some use cases for data storage that lend themselves to the CouchDB document model that provides some advantages over the table-based structure in MySQL. The first part of the series is Moving from MySQL to CouchDB: Part 1.

Just as a friendly reminder about what I wrote a month ago: we've already received a number of great talk submissions for the MySQL & Friends Developer Room at FOSDEM 2011, thanks to everyone who contributed so far! However, we still are looking for some more!

You can submit your proposal via this form. The deadline for turning in your talk is Sunday, 26th of December, 2010.

Just to recapitulate, the DevRoom (H.2213) will be available to us on …

I’ve started a little series on how to migrate your MySQL applications and databases over to CouchDB. Most of the process is about how you think about your data, not about the database itself, the application, or the interface to the database storage. There are some use cases for data storage that lend themselves to the CouchDB document model that provides some advantages over the table-based structure in MySQL.

The first part of the series is Moving from MySQL to CouchDB: Part 1.

Originally submitted at O’Reilly

Server bottlenecks and failures are a fact of life in any database deployment, but they don’t have to bring everything to a halt. MySQL provides several features that can protect you from outages, whether you’re running directly on the hardware, on virtual machines, or in the cloud. This…

MySQL High Availability

Good coverage of MySQL and replication

By sjmudd from Madrid, Spain on 11/24/2010 4out of 5

Pros: Easy to understand, Accurate, Well-written, Concise, Helpful examples

Best Uses: Intermediate, Expert

Describe Yourself: Sys Admin, Database Administrator

I work in quite a …

One significant new feature of MySQL 5.5 is the Performance Schema. I recently performed an upgrade from 5.0 to 5.5, however my check of differences in the MySQL variables via mysqladmin variables failed because we now have a new record long variable name “performance_schema_events_waits_history_long_size”.

The full list of new performance_schema variables are:

> | performance_schema_events_waits_history_long_size | 10000                                                                                                                  |
> | performance_schema_events_waits_history_size      | 10                                                                                                                     |
> | performance_schema_max_cond_classes               | 80 …

Dear Kettle fans,

PDI-200 has been out there for a while now.  Jens created the feature request a little over 3 years ago.  I guess the main thing blocking this issue was not as much a technical problem but more of a licensing and dependency one (Oracle JDBC dependency and distribution license).

However, now that we have the User Defined Java Class step we can work around those pesky problems. That is because the Java code in there only gets compiled and executed at runtime so it’s perfectly fine to create any sort of dependency in there you like.

The following transformation reads a set of rows from a stored procedure as described on this web page.

In short, our UDJC step executes the following code:

begin ? := sp_get_stocks(?); …

It's that time of the year again — the nice folks at FOSDEM have granted us a developer room at their upcoming conference (February 5+6 2011 in Brussels, Belgium)!

As usual there were more applications than they were able to accommodate, so we are very grateful for this opportunity for collaboration. Titled "MySQL and Friends", our room next year will be H.2213 with a capacity of 100 seats. It will be at our disposal on Saturday 5th, from 13:00 till 19:00. Like last year, we would like to set up a schedule of talks related to the MySQL server and the various projects that surround it. Each talk will last 20 minutes, plus 5 minutes of Q&A and a 5 minute break for switching speakers, giving us 12 slots in total to fill with …

When we published our 2008 report on the impact of open source on the database market the overall conclusion was that adoption had been widespread but shallow.

Since then we’ve seen increased adoption of open source software, as well as the acquisition of MySQL by Oracle. Perhaps the most significant shift in the market since early 2008 has been the explosion in the number of open source database and data management projects, including the various NoSQL data stores, and of course Hadoop and its associated projects.

On Tuesday, November 9, 2010 at 11:00 am EST I’ll be joining Robin Schumacher, Director of Product Strategy from EnterpriseDB to present a …

If you have used MySQL for some time you know that mysqld can write binlogs. This is usually used for backup purposes and JITR or for replication purposes so a slave can collect the changes made on the master and apply them locally.

Most of the time apart from configuring how long you keep these binlogs they are pretty much ignored.

Recently I came across an issue.  I have a slave server which is NOT configured read only and which has an additional database used to collect statistics from the replicated database and provided aggregation and business information. The typical sales per country, per product, per day, week, month, year, per whatever etc.  This is the usual datawarehouse type functionality.  It’s done on a slave and not the master so that the load is not passed on down stream to all boxes. …