is the working title of my first entirely self written song, consisting of 2 guitars (lead & rhythm), bass and drums. As of now, it doesn’t have a (real) title, vocals or even lyrics yet.

Watch and listen to me, as I’m playing the song:

Rhythm guitar, bass and drums which you hear in the video are exported from the original Guitar Pro 6 file. Guitar Pro is the awesome piece of software which I used for composing the song.

For audio recording I used Audacity, another great software. To combine video and audio, I used FFmpeg.

Hopefully this is only the first of many more songs. I have a few other songs started which only wait to be finished. My goal for 2013 is to get quite a few ready, so that maybe in 2014 I can plan to record an album, a dream that I’ve been having for at least the last 15 years. Looks like I am now one step closer. goes HTML5 video

In my role as Web Developer for I have always tried to advocate open web standards, and to adopt good new web technologies as early as possible. And I believe that an open source product like MySQL owes the World Wide Web open web technologies, rather than content which requires proprietary plugins. Which is why it’s a pleasure for me to tell you that demo videos which used to require Flash have been replaced by new demo videos which work with HTML5 video (and using Flash only as fallback for old browsers).

Take a look:

… or even better, take a look at the real thing at

Needless to say, not only the fact that these videos are delivered as HTML5 video is interesting, but of course also what the MySQL Enterprise Monitor can do for you, like analyzing your queries, or monitoring your replication and alert you when things go wrong.

And stay tuned, there is more to come in the future!

Another much needed cleanup had a great time of pretty flawless running recently. No outages, no emergencies, quite relaxing for an administrator. Except for one problem which got increasingly worse and worse: performance.

It was time to drop some users again. Who did I drop? First of all those who haven’t accessed their database for more than about 2 months. But also some who used up excessively much disk space. There is a kind of (unwritten) fair use policy, but is a testing service and not a backup service for huge data loads, so this data is gone.

And if I say it’s gone, it means GONE!

I made it unambiguously clear on the registration page that the team reserves the right to delete databases and/or accounts at any time without notice, and cleanups are exactly among the things I had in mind when writing this (besides the always possible danger of unintentional data loss).

So complaints will be silently ignored (or deleted, if posted in the forum, which by the way also got updated to the latest version).

However, I hope that most or better even all of you who do use in a fair manner will find their database again, and will continue to appreciate the service.

And the reward for your fair use should be better performance due to more available resources thanks to the cleanup. Which by the way certainly wasn’t the last one.

So while you should make sure to have backups of all sensitive data at any time, if you want to minimize the risk of losing your database at, access is frequently (a simple connect, regardless through which client, will do), and try to keep your dataload within reasonable limits for a low level budget of a testing service, which still is (rather than a hosting service). I can’t point that out often enough.

So happy testing … and remember to explore the new features of MySQL 5.6 which is the (probably soon to be released as GA) latest development version with the latest and greatest features!

Moons – not Earth’s, but Jupiter’s … proudly presenting: the Galileans

Taking good pictures of astronomical objects is quite challenging. Especially if you don’t own highly advanced (and very expensive) equipment.

For quite a long time I thought that the only celestial object which is in my reach to take good images of, was the Moon. Here is one of the better Moon images that I have taken:

Full Moon photo (taken 2011-03-19, ca. 20:30 CET), may be one of my best yet

Over time, both my skills and my equipments advanced a bit. And I managed to take pictures of almost all the planets out to Saturn (not counting planet pictures taken through web-based observatories like GRaS). There are:

Photo of Mercury rising over nearby house (taken today, January 18)

Venus (probably my best planet picture so far):
Photo of Venus, taken through telescope (image is mirrored)

Mars (the red dot on the left; certainly my worst planet picture so far, but for the purpose of completeness …):
Mars next to the Moon

… and Saturn:
Photo of Saturn, taken 2011-04-02 ~22:15 CEST (2 days before opposition)

I didn’t have a picture of Jupiter yet, but that is rather coincidental, as Jupiter is the brightest planet just after Venus and certainly an easier target than Mercury, Mars or Saturn.

Today I not only completed this collection by adding a picture of Jupiter, but also passed another milestone. My first pictures showing Natural satellites (colloquially known as moons) other than Earth’s Moon. Here is Jupiter with (from left to right) Io, Europa and Ganymede:

Jupiter with Io, Europa and Ganymede

To complete the Galilean Family, I took another one showing Io and Callisto (the little dot quite some distance outside):

Jupiter with Io and Callisto

Last but not least, this is what they looked like in Stellarium (Stellarium is what actually allows me to tell which dot is which moon).

Jupiter with Io and Callisto

Neptune, Vesta, ISS, Endeavour space shuttle, and a mag. -8 Iridium Flare

What makes a great observation night? You get to see a lot of things that you don’t get to see every day.

This night (morning of May 31, 2011) was good weather and good sight. Basically I put out the binoculars because I went to see Neptune and asteroid 4 Vesta again, which I already observed yesterday.

Neptune isn’t spectacular, it looks just like an arbitrary star and if you didn’t know its exact position, you would never recognize that it is Neptune. I use primarily Stellarium which has always been reliable and serves the purpose of letting me know where to find a particular object very well. So it also left no doubt that what I was looking at was indeed Neptune.

The same was true for Vesta yesterday. I knew its position based on Stellarium, and it was particularly easy because it was located very near to star ι Cap. (Iota Capricorni), which is easy to find. And since it was where I assumed it to be, there was no reasonable doubt left that I was looking at anything different.

But the great thing especially about observing an asteroid is when you have a chance to look for it on 2 consecutive days, especially if it is that near to a significant star. One can see how it changed its location and that’s real evidence that it is not just an arbitrary star (even though it looks just like one).

Here is Vesta’s position of yesterday at 3am local time:

Location of Vesta 2011-05-30 03:00

And here is Vesta’s position today:

Location of Vesta 2011-05-31 03:00

That’s just what I’ve seen. Take this lesson: while what you are seeing may seem boring, to know what you are looking at can be very fascinating. Even though a dot in the sky may look just like the thousands other dots, it can be something very different … and to find and identify (and eventually track) them is a rewarding thing to do (in my opinion).

But there was more this night. It’s always a good idea to take a look at to watch out for special observation opportunities. And this night delivered HUGE opportunities.

First thing was a Magnitude -8 Iridium Flare at 3.17am. Iridium Flares are pretty common and there is one (or more) to see almost every night. But such with mag. -8 – which is almost as bright as an Iridium Flare can get (about 17 times brighter than Venus at its brightest) – don’t show up that frequently, maybe once in a week or two. And more often than not, either the weather isn’t good or you just forget to check them out. So if there actually is such a bright one during a night that you do observing (and don’t forget to look them up at Heavens Above), you are quite lucky. And this was quite a mighty one, one of the best I’ve seen.

But the real jewels were yet to come.

The STS-134 mission is nearing its end and the space shuttle Endeavour undocked from the ISS just yesterday. This is even more significant as the space shuttle program is coming to an end, and it’s likely the last opportunity ever to see what I had the chance to see tonight (saying this with a tear in one eye, but also with a little smile as it’s time for new challenges beyond low Earth orbit).

Heavens Above showed me that the ISS was about to pass at ~3.34am this night (only 17 minutes after the Iridium Flare). When a space shuttle is on its way back to Earth, you can assume it to show up just a few seconds ahead of the ISS. There was something else that Heavens Above showed me which was very interesting. The path of the ISS led just below the very bright and significant star Deneb Algedi (δ Cap. or Delta Capricorni):

ISS path 2011-05-31 03:34
Deneb Algedi is the star in the center of the chart, right next to the 03:34:30 marker (which is the time the ISS passed it)

So I knew exactly where to look and where to point my binoculars too, which I could prepare even before the Endeavour/ISS pair showed up. I only had to wait until I could see them with the naked eye (very easy since they are both very bright), go to my binoculars, wait until they show up below Deneb Algedi, and follow their ways. An easy job even for a moderately equipped and modestly experienced amateur astronomer like me, but very rewarding.

But the really big deal about this all is that you a) neither need a big budget and b) nor need many years of experience to do just what I am doing. My Omegon Nightstar 25×100 binoculars cost € 299.00. Other than that you need only a PC and an internet connection, which you are likely to have already, if you are reading this. And last but not least, a little bit of passion for what’s going on above us.

5th anniversary working for MySQL

On May 17, 2006 – exactly 5 years ago – I started my new job as web developer at MySQL AB.

Since then I closed 3,049 web requests, worked with 9 colleagues in the web team, had 4 direct managers, attended the MySQL User Conference in Santa Clara, CA 4 times (2006-2009, although in 2006 I wasn’t an employee yet, but that was when I got hired, so lets count it) and one all-company meeting in Orlando, FL and went through 2 acquisitions: in 2008 to Sun Microsystems and in 2010 to Oracle.

Time to say thank you to all the great people who I had the pleasure to work with during these 5 years!