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Various databases and how they scale

By chance I stumbled upon an article about databases and how they scale. It's a great read and does an excellent job describing the various stengths and weaknesses regarding different kinds of scaling for databases. Especially the images really capture the essence. 

Think Bayes: Bayesian Statistics in Python

There's a free download available of "Think Bayes – Bayesian Statistics in Python" over at it-ebooks.info. A small excerpt from the book: The premise of this book, and the other books in the Think X series, is that if you know how to program, you can use that skill to learn other topics. Most books […]

MobaXterm – (Free) All-in-one Xserver/SSH/Linux environment for Windows

I recently stumbled on MobaXterm. It's a complete unix enviroment including X Server/SSH/Telnet/SCP/FTP client all in one. The list of features is impressive to say the least. This is an excellent replacement for Putty. A small selection of the most useful features: Free. What more is there to say? Tabs and Horizontal / Vertical split […]

Pocket: consume all content offline on your mobile device

My smartphone doesn't have a data plan because the last thing I want is to be able to check my email and facebook while I'm not behind my PC. I do like to read though, so I want to use my smartphone to read content I've previously somehow flagged as interesting. I've tried many apps. […]

Read the POSIX standard

Stop reading your local manual pages when programming/scripting stuff, and use the POSIX standard instead: Online POSIX 2008 (EEE Std 1003.1-2008) standard There are four main parts: The Base Definitions (XBD): The basics of a POSIX-compliant system. The System Interfaces (XSH): What POSIX-compliant systems offer to programs. I.e. programming in C (stdlib) The Shell & […]

Filesystem Latency

There's an interesting on-going series of articles on file system latency over at Brendan's Blog. Usually when system administrators look into I/O performance, we look at the I/O of the disks. This is usually fine for a rough estimate of raw disk performance, but there's a lot more going on between the actual application and […]

This is why I don't use Apple products or DRM media

This company is going out of business because they put all their eggs in a very delicate and quite frankly evil basket: BeamItDown Software and the iFlow Reader will cease operations as of May 31, 2011. We absolutely do not want to do this, but Apple has made it completely impossible for anyone but Apple […]

Einstein for everyone

Lecture notes on the work of Einstein and physics inspired by Einstein's work: The course is aimed at people who have a strong sense that what Einstein did changed everything. However they do not know enough physics to understand what he did and why it was so important. The course presents just enough of Einstein's […]

Easy way to create a Debian package and repository

Interesting article over at Linuxconfig.org: This article describes a simple way on how to create a home made debian package and include it into a local package repository. Although we could use a existing Debian/Ubuntu package, we will start from scratch by creating our own minimalistic unofficial debian package. Once our package is ready, we […]

Regular expression Denial of Service (ReDoS)

It's only logical, but I hadn't really thought about it much. Turns out Regular Expression can be vulnerable to external Denial of Service attacks.