Lifelog

Some weeks ago i got some new monitors for my employers (2x Samsung Syncmaster 226 Bw). After checking out some monitor specifications i was fully convinced that these 22′ monitors were the best available monitors (price/quality), the Samsung 226BW has a response time of 2ms and a contrast ratio of 3000:1. After wortking with these monitors for 2 weeks, i was convinced of Samsung, an upcoming power in hardware parts.

So after the nice “Ricoh incident“, i needed a new printer. Again checking review websites as well as pricewatch listings, i didn’t find a suitable printer that would offer me the functions i need. This is what i had on the requirements list :

• Laser color printer
• Less then 800€
• Scanning capabilities
• Scanning capabilities
• Fax

When calling around & checking some various shops, one of those shops told me he had a brand new Samsung CLX-3160FN in stock (the last one), it’s a new Laser printer (all in one) solution that wasn’t even listed on the belgian Samsung website. (so i guess it was really new). I went to pick it up, although i noticed the specifications noted the CLX-3160FN printer could only print about 4pages per minute (in color), at the same time it had many other functions to compensate for the slow color printing (black&white has 16ppm). I was pleasantly surprised the printer had the retail price of 500€, what was less then i paid for the Ricoh machine 2 years ago.

Coming back @ our office, i immediately unpacked it. The CLX-3160FN comes with very good & brief instructions. You could call it a ‘fool-proof’ installation procedure. The printer picked up an ip adress from the DHCP server, allowing us to connect to it after about 10 seconds. After installing the drivers i noted the menu’s & applications were very clear & user friendly. I got a 10minute “godmode’ feeling when playing around with various features like : scan to email, scan to application, multi scan, fax from computer, fax to email etc…

I’ll write about some of these features later, it all comes down to my main point : “Samsung & CLX-3160FN rock ! ”

Digital Base is looking for young skilled Belgian (dutch speaking) web developers. If you want to work in a small team on various projects (medium to large business) in a relaxed & friendly environment send your CV to me at snk00sj@digitalbase.eu Before you do that, make sure you have the following qualifications :

• under 30 years/old
• native or perfect dutch speaking
• decent knowledge of english
• good social skills
• excellent PHP knowledge
• good OOP knowledge
• close/around Leuven (office @ leuven)
• basic knowledge of version management systems (cvs, svn)

Make sure to mention your references and/or degrees.

Talk to you soon

2 years ago, i bought a CL2000 printer (Ricoh), thinking that i would be using this one for the upcoming 5 years, as i am not a frequent print-guy, paperless office remember ? Very good printer, stable, fast, not too noisy….

Now after 1year and a few months, the color began to fade. Pages came out semi-printed, right untill the point i couldn’t print anything at all. So i called the Ricoh helpdesk, as i was pretty sure the machine was still under warranty (2years), they told me to contact me reseller, and let him manage the warranty.

So that’s what i did…I sent a mail to the computershop where i bought this machine, very nice people. They told me to bring in the machine, so that’s what i did…So now yesterday i got word of Ricoh, seems like my printer is totally screwed, but what is worse is the reason :

Ricoh service checked my machine and noticed that there was still a coating/plastic underneith 2 of the toner cartridges. (see pictures below). So 2 years ago, when installing the machine, i was stupid enough to pull out 2 of the plastics, and leave 2 others behind ??!…In these kind of situations it’s always my word against theirs, but i am fully convinced that i couldn’t be this stupid leaving 2 of those plastics behind. So now i ask myself :

• Why couldn’t a 700$ machine not detect there is something wrong with the feeding of the toner ?
• Why do these problems popup after 1,5 year after about 1000 prints ?
• Why didn’t maintenance tests on the machine itself (color correction, alignment & refill status) not notice there was something wrong ?
• How could those plastics screw up the entire machine ?
• After taking out the toners at the office & in the computershop, we didn’t notice the plastic coating outselves ?

I was informed there are alot of broken / to-be-replaced parts on the machine. Apparently these costs will climb to about the price of a new machine (or even more expensive), +500€. I attached the pictures below, before you start accusing me how stupid i am, i am really sure i followed instructions, and also fully convinced “home-installations” need to be made “fool-proof”, that means the machine should detect a problem….

[Show as slideshow]

Now lets hope when they send this machine back, we can still use some parts. As i know several people that use the same machine.

As we are currently three employers working in a “non-office” building, i would like to show you all how our offices look like. This used to be a children barbershop (Bles & Tres), that’s why the floor is red, and the wall has a children’s wallpaper. I have to admit, i am starting to get used to it (not to mention i almost like it :p ).

[Show as slideshow]

I know i have been slow on updates & posts, shame on me ! But i am back with a small update.
I’m doing great, working full time from the “Digital Base” offices right now together with my 2 colleges. We’re working on 3 projects at the same time, and new offers keep coming in…

I’ve upgraded the wordpress engine (2.1), and pimped it using the “simpla” theme, with some small modifications (especially the sidebar). I will be adding more functionality & content soon. Also note i disabled the comments for now…. Come back soon

We’ve all been there before, you’ve been hired to finish / work on someone elses work, and you encounter some very strange behaviour. If you’re working on a small website, going through the code should provide you with the necessairy information to solve this issue, however, if the application is somewhat bigger (multiple components, databases, caching, dynamic code building, multiple objects …) it’s always nice to know exactly what code is being executed on a certain moment.

Imagine you have found the exact page / function / action where it’s going wrong, and you are trying to debug it. Commercial companies offer solutions like Zend Platform / Zend Studio to debug, view stacktraces, variable watches & alot more…and i am mostly using Zend Studio for that too, but at this moment in time, Zend does not offer a windows library for Zend Platform that supports PHP 5.2.0, neither did they release a fix for Zend Studio 5.5 to build inspectation data over a Samba share…So let’s do the same thing using XDebug, afterall the world still spins without Zend.
Make sure to get the right windows or linux module for your php version from www.xdebug.org and use the installation instructions to get it running, make sure to check phpinfo to see if the xdebug is loaded. When everything is installed, we’ll start by profiling a certain action to find out what exactly the page/action is doing. Make sure to adapt your php.ini with the following configuration :

zend_extension_ts=”c:/apache/php/ext/php_xdebug-2.0.0rc2-5.2.1.dll”

[xdebug]
xdebug.remote_autostart=1
xdebug.remote_enable=1
xdebug.remote_handler=dbgp
xdebug.remote_mode=req
xdebug.profiler_append=0
xdebug.profiler_enable=1
xdebug.profiler_enable_trigger=1
xdebug.profiler_output_dir=c:/temp/
xdebug.profiler_output_name=profile

After that restart your apache, and open the page you want to analyse. As soon as you send a request to the webserver it will create a file in the c:/temp (or whatever path you defined). For me it generated a file (c:/temp/cachegrind.out.5808). This file contains alot of information what exactly php was doing on your request. Call it a stack trace. This file is human readable but does not give an immidiate overview, that’s why i would suggest to use a program to analyse the cachegrind. To my knowledge, the best program to-do that is KCacheGrind, the downside is that is a KDE program, so if you are using windows you would need alot of hacks, just to get KCacheGrind running, thats why there is a windows port (with less features) available called WinCacheGrind. If you open WinCache use the File>Open File dialog and relocate to the cachegrind.out file (for me c:/temp/cachegrind.out.5808), depending on the size of your file, wincachegrind will start analysing and give you a visual representation of the stack trace of your action.

Note that all pages you visit from now (untill de-activating the module in php.ini) will get ‘profiled’ and generate a cachegrind file. As this is filesystem intensive, i would suggest commenting the above php.ini section as soon as you’re done and restart your webserver.

In my previous post, i talked about the writing of a custom datagrid for propel usage. The required features for this datagrid would be :

• easy configuration
• multi sortable columns (ascending & descending)
• search features
• add actions to one or multiple records (icon + action)
• sizeable columns
• go to page x
• ability to change rows per page

So since my last post, 2 weeks have passed and i am proud to say we’ve finished a large part of the code. Now we are still having problems with the javascript to allow the user to change his column width in multiple browsers, IE seems to refuse some of the javascript code. I am still looking into that.

P.S. : I have been getting several e-mails with code requests. Untill i am really done i won’t give out the code. If you think you can help me with the javascript resizing issue though, you can always drop me an e-mail.

Because we are using propel in most of our larger projects, it’s very common we need a datagrid for the listing of the objects. A year ago we made a datagrid with the most important features combined with an ajax approach (sorting, filtering…), for the ajax functionality we wrote our own javascript function calls, what led to alot of unmanageable code, both javascript and php.

As time moved on, this loading of the datagrid became slower and slower (due to increasing objects, about 9000 records with multiple joined tables). This was mainly because the old datagrid first loaded all objects, and then sorted the entire array by the columns as defined by the user….don’t tell me..i know ! This is a bad approach, that means all records get looped, and if you are using propel that would mean for each of those 9000+ records an object is created…that’s crazy…(it has some advantages though)…

So now i finally found some time to do a total rewrite of this datagrid, combined with the power of the propel pager, propel criteria & the php/ajax framework xajax, i came up, faster then expected, with a powerfull scalable datagrid that only loads the visible records. All switchpages, sorting & filters call a corresponding ajax function. These functions change the criteria in the object and reload the datagrid. I’ll elaborate on this later, by showing you some code and perhaps an online example.

Lately i noticed Zend Studio wasn’t running as smooth as before. When going into hibernate or logging off, i often notice javaw.exe has crashed, that caused the system not to shut down. To fix this problem i’ve found several solutions, i’ll list those here for future reference :

• make sure the power settings do not use the option to enable cpu throttling (this seems to be a java issue)
• try replacing zends jre by JRE 6 (http://java.sun.com/javase/6/download.jsp)
• disable the OS look&feel in your zend application
• disable all power management for your video card
• if you are using a dual monitor setup, make sure the editor & palettes are on the same monitor/display
• remove the Zend Project cache file : /Documents and Settings/{Win username}/ZDE/config_5.1/caches/
• expand the heap sizes (to more then 256 MB) the JRE needs for the Studio to function [file: {studiopath}/bin/ZDE.lax]
  
• if you have a 64b machine, make sure you have the 64bit java lib
• try disabling your antivirus for a second and check if performance goes up
  
• if you are using an external subversion client (not ZDE’s), make sure your options in ZDE are on CVS. (options > source control). Performance gets a huge boost (integrated svn is causing a problem when using 3th party tools)
  
• submit a support ticket (http://www.zend.com/support) (make sure to mention you tried all t he above steps, and provide as much detail as possible, because they won’t fix your problem untill they have everything they are looking for : hardware, software, ZDE.log, description of the project)
  

Here’s the info I found posted over at the PhpBuilder.com Zend Studio Forum by MStaniszczak (post is no longer there). This item addresses the speed of the java virtual machine, and for those of us running Intel processors, this tends to be faster than the Sun JRE. If you’ve got an AMD processor, this may or may not yield any performance.

Head on over to BEA Systems and get the JRockit 5.0 JRE. Don’t worry about the SDK, unless you’re a Java programmer. It’s about 30 megs, so dial-up beware. After downloading it, extract the exe (right click, extract archive).

After you’ve done that, you should see some files, as well as another archive or zip file named something like win_ia32_jrockit150_04_jre.zip. You’ll want to extract that as well, to it’s own directory or folder (name it jre) , and that’s going to be what we need.

First, make sure the ZDE is not currently running. If it is, exit it. Now, find your installation of the Zend Studio client. It should be something like C:/Program Files/Zend/ZendStudioClient-5.0.0/. You’ll see a directory already named jre. Rename it to jre_old. Copy the directory we created from the archive into the ZendStudioClient-5.0.0/ directory.

For me the HEAP size, in combination with the source control tab (to cvs) did it, as i am using tortoisesvn for version management.

2,5 years ago, when starting my own company, we wanted to offer webhosting to our webdesign customers, that’s why we decided to buy a server, and make use of a ‘colocation’ host for a 1U server. Pretty soon, it became clear we would need another ‘development’ machine to test/debug our applications before going live…So we bought another one…

Because we now had 3U’s space, we decided to look for a larger spot, so we would have more options afterwards. I convinced my cousin’s company to come along, and we decided to rent a 1/2 rack (colocation) in Amsterdam. At that moment we were still hosting gameservers, so we regulary did server updates (new hardware etc)…Now if you know that going to Amsterdam, without traffic, takes about 3hrs (and 3 hours back) by car, you can see that this is a terrible situation, and especially when your hardware malfunctions once in a while…

So at the end of my contract, i decided to move to Belgium with my servers. The prices of colocation in the Netherlands were booming because of energy pricing (that’s what they told me), and the service wasn’t all that either….

Because my network administrator has a small colocation company in Antwerp, Belgium. I decided to give it a go. Important detail is that i don’t profile myself as a webhosting company but i offer webhosting solutions to my webdevelopment clients. This way i do not have to keep 1000+ users in account, and i can guarentee maximum uptime to my clients (i know exactly which modules, dependancies, configuration these clients need).

Now as time is going by, my company has some decent clients that require maximum uptime. Because the location in Antwerp is fully dependant of realroot (a major player on the belgian colo market) we’ve had a few problems. Being dependant of only one company is a major flaw in any case, so i started looking for alternative solutions…And i did, a Brussels based colocation company, this company offers everything i need (multiple power feeds, independant network, own RIPE account), now let’s hope we could stay here for a while…