Sunday, October 16th, 2011

I you ever stumble over the error message defining the title of this blog entry: OA> connect server 1 Invalid MP IP Address: Operation failed. And your EBIPA settings looks like this: OA> show ebipa EBIPA Device Server Settings Bay Enabled EBIPA/Current Netmask Gateway DNS Domain --- ------- --------------- --------------- --------------- --------------- ------ 1 […]

Wednesday, January 20th, 2010

A couple of days ago, I stumbled over an installation in which CGI was used to run a Python-based web application. Of course the applications ran terribly slow, and as I mentioned earlier in »Save energy! Stop using CGI!«, it's (nowadays) always a bad idea to use CGI. Not only it's tediously slow and bad […]

Thursday, January 7th, 2010

Happy New Year everyone! Hope you could enjoy your holidays!! Let's start this year with the third part of my little series of thoughts about caching. After my small memcached intro and thoughts about caching architectures, I now focus on the data you should consider to cache in your web application. [1] Cache HTML Obviously […]

Thursday, December 17th, 2009

On Tuesday I focused mainly on memcached and PHP, but today I'll take a wider look at cacheing architectures in general. The main question about defining a cache architecture is to decide where to locate the caching component: [1] Status quo, the three-tier architecture In theory, the commonly accepted standard architecture of a software product […]

Tuesday, December 15th, 2009

Caching is probably the most important technique you should use in nowadays web sites or web application. Sure, scaling your hardware is still the final answer to all your load problems, but with some kind of caching your application will scale far better rather than without. Currently my favorite caching tool is memcached. It's a […]

Thursday, November 5th, 2009

If you're used to be a VMware user and try to switch to the Open-Source side of the Force by using VirtualBox, you may run into difficulties if you try to import an existing VDI file into VirtualBox. Actually it's quite easy, if you know how. The main difference between VMware and VirtualBox is that […]

Tuesday, October 13th, 2009

Just learned that the question "what is java" is on place 3 of Google's Zeitgeist ranking 2008 for "what is" questions - right after "what is love" (first place) and "what is life" (second place). Indeed a good question. Let's take a look a Google's top hits to this question: (Hit #9) Java is […]

Wednesday, October 7th, 2009

My last blog entry about Linus Torvals' thoughts on the goto statement brought and old email interview back to my mind, which I had the honor to have with him a long time ago in 1994. From cs.Helsinki.FI!Linus.Torvalds Wed Jun 22 20:45:59 1994 From: torvalds@cs.Helsinki.FI (Linus Torvalds) Date: Wed, 22 Jun 1994 21:45:52 +0300 In-Reply-To: […]

Tuesday, October 6th, 2009

As PHP 5.3 introduced the goto statement the old discussion about the evilness of goto came back to the surface of the Internet. By coincidence I stumbled over this 6 years old discussion with Linus Torvalds about this topic. He's arguing goto makes the source code more readable, but read his thoughts and decide for […]

Friday, September 25th, 2009

Today I needed to play around work out something on RHEL and OpenSolaris. I have both systems running in a VirtualBox on my Mac and because of the latest update to VirtualBox I was supposed to update also the so called Guest Additions on RHEL and OpenSolaris. The update went smoothly on RHEL, but on […]

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