Category: Technology

I work in technology sector. And I do round a clock, not only from 9 to 5. It is my bread and butter, it is my hobby, it is the fascination of my life. And with the current rate of change particular in information technology (IT), there is always something new to learn, to try, to talk about. I often post news, thoughts, and reviews. And when I do, this is the category I use.

There is hope for KDE 4

Here is the story about openSUSE 11 with KDE 4.0.4 in KDE.news.  Do you want to know what I thought was so special about it?  I’ll tell you.  It features screenshots of the KDE desktop with some icons.  Yes, this is the first bunch of KDE 4 screenshots with desktop icons that I saw.

Sounds surprising?  Well… imagine how surprised I was, when after seeing dozens upon dozens of KDE 4 screen shots and then trying it out myself I realized that one part of it that was totally unusable was the desktop and its icons.  After I tried it, I was trying to remember any screenshots that had icons on the desktop, and I could not.  There was everything from the “amazing” new menu and lighter file browser to configuration tools and updated tools.  But there were no desktop icons.  And now they are there.  So, I guess, there is still hope for KDE 4.

Longer video? Maybe.

Scobleizer believes in longer videos:

Advertisers also will pay a lot higher rates for those long-form ads.

Why?

Because someone who’ll watch a 30-minute video is HIGHLY ENGAGED. They are far more likely to become a customer than someone who just watches a two-minute entertaining video.

I think that “video” is too broad for this topic.  To consider only educational and entertainment videos, I see a huge difference.  I don’t believe that entertainment videos will become longer.   Entertainment is a sort of thing that doesn’t have to go either deep or long.  Thus it doesn’t need large chunks of time.  Educational video is a totally other story.  While there are many “howto” type of videos, many topics require more than 5 minutes to explain.  Take Google Tech Talks for example.  They are pretty popular and each one takes about an hour.

There is also this factor of production costs.  It’s much harder to create 60 minutes of high quality (and I don’t mean pixels or bytes) video material, than 10 minutes.  Or 5.  Filmmakers know that.  And the audience knows that.   While less and less filmmakers will risk it, and more and more of those who do risk it will produce crapy long videos, the audience will learn the benefit of a short video and will be more inclined into choosing shorter formats.

However, since I am not at all involved in any video production or distrubtion, I might be totally wrong on this.  Judging purely from my own experience.  And my own experience mostly comes from YouTube and Google Video.

Nuke the fridge

I’ve recently enjoyed the “Indiana Jones and the Kingdom of the Crystal Skull” movie.  However there was one particular scene which sticks out.  It was the moment when Indiana yet again avoided his certain death, this time by hiding in the kitchen fridge.  He was supposed to die of a nuclear explosion, but the fridge saved his hat.

Impossible?  Of course.  But there was something more to this.  Something that bothered me for the last few days.  Something that I could not find the words to express.

It turns out, I am not the only one.  There was a hot discussion at IMDB forums, and at other places that have crowds of movie watchers and reviews.  And apparently, a new term was born – “nuke the fridge“.

This is also a nice example to illustrate how the world changes with the Internet.  Lots and lots of people talk about lots and lots of things.  24×7.  Non-stop.  That generates lots of ideas, sub-cultures, products, and services.  And, in tern, lots and lots of money for people who dig it.  Nice.

Fixing Firefox with safe mode

Here is something useful I learned today.  Until recently I’ve been using Firefox 3 beta 5.  It was working fine for me after I found all replacements and upgrades for all the extensions that I need.  One of those extensions was CompactMenu (not giving a link for now).  This extension replaces the whole main menu (File, Edit, View, etc) with a single icon.  You can place this icon anywhere on your toolbars and when you click it, you’ll get a drop down with your main menu items.  Huge space saver.

Yesterday, I upgraded my Firefox to the latest and greatest stable version 3.  The update came as an official package from Fedora updates.  However, once I fired up the new Firefox, it notified me that CompactMenu was not compatible with this version and so it was disabled.  Can you guess where I ended up?

Exactly.  No menu and no way to get to the menu.  I tried uninstalling the extension, intalling another version of it, unintalling it again, cleaning up options in about:config, customizing the toolbars, and so on and so forth.  Nothing worked.  And so I Googled.

It turns out that Firefox has something called a “safe mode“.  All you need to do to get to it is start firefox with “–safe-mode” parameter.  Once it comes up, you’ll see the window as on the screenshot above.  One of the optios is “Reset toolbars and controls“.  It works wonders.  I got all the toolbars to their default state, and with View -> Toolbars -> Customize I could easily get them to the state I want.

BLOB is bad for your (mental) health

If you ever mention that your web application uses database to store files, you risk being flamed into oblivion.  Indeed, in most cases, it is a bad idea, since file system is more effecient when it comes to files.  However, there are cases when it makes sense to have files saved in the database.

Maybe I am doing something wrong, but in the last six month, I had to develop at least three systems that used MySQL for file storage (uploaded files that have to be synchronized across several hosts, etc).  Yesterday, for the third time I stumbled across the same problem, that almost drove me insane.

MySQL has four data types for storing binary data – TINYBLOB, BLOB, MEDIUMBLOB, and LONGBLOB.  Somehow I always forget about these and use BLOB.  BLOB works just fine, but it has a limit on size, which is rather low – 64 KBytes.  The mean thing here is that it will work just fine with most of the test data – text files, short PDFs, and small pictures.  Once the application is tested and put into production, the corrupted files will start coming in.  Re-writing all parts that deal with uploading, moving, cleaning, escaping, and encrypting binary data takes time.  Going through file reading and writing routines is boring too, and it won’t help either.

By the time, the issue is discovered and all fields are changed to LONGBLOB, it is often very late, and you’ve lost your weekend, as well as a lot of large files. This post is an attempt to save my (and your) sanity.

Reminder: use LONGBLOB instead of BLOB for file storage, unless you are absolutely sure about the maximum size of incoming data.