Digital Tech Trek Digest [#Issue 2024.06]

MySQL Belgian Days 2024 and FOSDEM 2024

In this past week, I’ve been able not just to read or watch digital content online but to meet people in person. In Brussels, first at the MySQL Belgian Days 2024 event, followed by FOSDEM 2024.

There was a wide array of presentations covering many different topics; this is just a summary. Fred talked history of Command Line Monitoring and an intro to the new player Dolphie. Dave Stokes talked security, Sunny Bains gave us a brain dump of TiDB scalable architecture. We got an update on PMM and MySQL on k8s from Peter Zaitsev as well as a chat about his new product coroot. And then a great intro to a new generation of online schema change at scale with Sprit by Morgan Tocker. Alex Rubin shows us how not how to hack MySQL, but how MySQL can hack you. We have all crossed paths as MySQL Inc. employees or MySQL community members since 2006.

Marcelo Altmann gave us a detailed intro of a new era of caching with ReadySet. We also heard updates on Vitess. And that was just Day 1 presentations. The evening event was at the incredibly wall-to-wall packed Delirium Café, sponsored by ReadySet, which we offer great thanks and cheers.

Day 2 was packed with great content about MySQL Shell, MySQL Heatwave ML and Vector, MySQL Router, and the MySQL optimizer from many well-known Oracle MySQLers before amazing awards, Belgian beer, and black vodka, of course.

Congratulations Giuseppe Maxia on your MySQL Legends award at MySQL Belgium Days 2024. It is well deserved for all of your community contributions over the decades.

Check out the details at Unveiling the Highlights: A Look Back at MySQL Belgian Days 2024.

Saturday and Sunday were FOSDEM 24 and its usual location. So many people crossing the university, tunnels, and weird transit paths between all the university lecture halls it can feel like a blur. For the first time, I had no fixed agenda so I could check out random talks on random topics.

A shout-out to many people I know and some new people I met. Colin Charles, Alkin Tezuysal, Walter Heck, Charly Batista, Robert Hodges, Jens Bollmann, Monty Widenius, Matthias Crauwels, Michael Pope, Marcelo Altmann, Emerson Gaudencio, Aldo Junior and tons more I have forgotten to mention by name. There were many conversations also with random community people I didn’t even get names, for example, the team at Canonical.

About “Digital Tech Trek Digest”

Most days, I take some time early in the morning to scan my inbox newsletters, the news, LinkedIn, or other sources to read something new about professional and personal topics of interest. I turn what I read into actionable notes in a short, committed time window, summarizing what I learned, what I should learn and use, or what is of random interest. And thus my Digital Tech Trek.

Some of my regular sources include TLDR, Forbes Daily, ThoughWorks Podcasts, Daily Dose of Data Science and BoringCashCow. Also Scientific American Technology, Fareed’s Global Briefing, Software Design: Tidy First? by Kent Beck, Last Week in AWS to name a few.

Beyond MySQL GA: patches, storage engines, forks, and pre-releases – FOSDEM 2010

Kristian Nielsen presented “Beyond MySQL GA: patches, storage engines, forks, and pre-releases”.
This included a history of current products:

Google Patches (5.0 & 5.1) included improvements in :

  • statistics/monitoring
  • lock contention
  • binlog
  • malloc()
  • filesorts
  • innodb I/O and wait statistics
  • SHOW …STATISTICS statements
  • smp scalability
  • I/O scalability
  • semisync replication
  • many more

Percona Patches (5.0) focus on

  • statistics/monitoring
  • performance/scalability
  • buffer pool content/mutexes
  • microslow patch

These have been ported to 5.1 and mainly integrated into XtraDB.

EBay Patches (5.0) have included:

  • variable length memory storage engine
  • pool of threads
  • Virtual columns

XtraDB storage engine (5.1) includes

  • Percona patches
  • Google patches
  • Innodb patches
  • Has XtraBackup for backup

Other engines/patches discussed included:

  • PBXT storage engine – community contribution
  • FederatedX – replacement to Federated
  • Sphinx storage engine
  • Pinba storage engine – Collects PHP statistics
  • Others OQGraph/Spider
  • Galera – Synchronous replication
  • Drizzle

Alternative packaging options for MySQL 5.0 and MySQL 5.1 including Our Delta, Percona and MariaDB.

FOSDEM 2010 MySQL Developer Room Schedule
FOSDEM 2010 Website
Brussels, Belgium
February 7, 2010

Multi-Master Manager for MySQL – FOSDEM 2010

The next presentation by Piotr Biel from Percona was on Multi-Master Manager for MySQL.

The introduction included a discussion of the popular MySQL HA solutions including:

  • MySQL Master-slave replication with failover
  • MMM managed bi-directional replication
  • Heartbeat/SAN
  • Heartbeat/DRBD
  • NDB Cluster

A key problem that was clarified in the talk is the discussion of Multi-Master and this IS NOT master-master. You only write to a single node. With MySQL is this critical because MySQL replication does not manage collision detection.

The MMM Cluster Elements are:

  • monitoring node
  • database nodes

And the Application Components are:

  • mon
  • agent
  • angel

MMM works with 3 layers.

  • Network Layer – uses a virtual IP address, related to servers, not a physical machine
  • Database Layer
  • Application Layer

MMM uses two roles for management with your application.

  • exclusive – also known as the writer
  • balanced – also known as the reader

There are 3 different statuses are used to indicate node state

  • proper operation
  • maintenance
  • fatal errors

The mmm_control is the tool used to manage the cluster including:

  • move roles
  • enable/disable individual nodes
  • view cluster status
  • configure failover

The Implementation challenges require the use of the following MySQL settings to minimize problems.

  • auto_increment_offset/auto_increment_increment
  • log_slave_updates
  • read_only

FOSDEM 2010 MySQL Developer Room Schedule
FOSDEM 2010 Website
Brussels, Belgium
February 7, 2010

State of phpMyAdmin – FOSDEM 2010

Following the opening keynote “Dolphins, now and beyond”, Marc Delisle presented on “State of phpMyAdmin”.

phpMyAdmin is an DBA administration tool for MySQL available today in 57 different languages. This is found today in many distributions, LAMP stack products and also in cpanel. The product is found at

There are current two versions, the legacy 2.x version to support older php 3.x & 4.x, The current version 3.x is for PHP 5.2 or greater.

The current UI includes some new features including.

  • calendar input for date fields
  • meta data for mime types e.g images, which is great for showing the output as an image, otherwise blob data
  • Relational designer with the able to show and create foreign keys

The New features in 3.3 (currently in beta) include:

  • Replication support including configuring master/slave, start/stop slave.
  • Synchronization model showing structure and data differences between two servers and ability to sync.
  • New export to php array, xslx, mediawiki, new importing features including progress bar.
  • Changes tracking for changes on per instance or per table. Providing change report and export options.

FOSDEM 2010 MySQL Developer Room Schedule
FOSDEM 2010 Website
Brussels, Belgium
February 7, 2010

Europe conference options for MySQL Developers

For those in the US the annual MySQL UC is taking place again in April. For those in Europe we have dedicated room for MySQL and MySQL related products/variants/branches at FOSDEM 2010 being held in Brussels, Belgium on 6-7 Feb.

This conference will feature a full day of talks with a format of 20 minutes presentation and 5 minutes Q&A. More information about submissions can be found at Call for Papers for “MySQL and Friends” Developer Room at FOSDEM 2010 now open!

Other references:


Wednesday January 6th is the last date for submissions. Extension for FOSDEM MySQL