Category

ict / computers

• gadgets, games, ict / computers

  Rubik’s phone just beat you

  02.04.10 | Permalink | Comment?

  This is quite amazing: A guy called David Gilday has built a Lego Mindstorms NXT robot that solves a 4x4x4 Rubik’s Cube (way harder than a 3x3x3), but the twist is: the real brains of the operation is a Nokia N95 that actually scans the cube with its camera, figures out how to solve it [...]

• ict / computers, work

  To certify or not to certify?

  01.05.10 | Permalink | Comment?

  Recently I passed my VMware VCP 3 and VPC 4 exams (i.e.: VMware Certified Professional on versions 3 and 4), which to be honest felt kind of odd as I’ve been doing things with VMware way beyond these certifications’ standards for quite a while…which leads me to ponder the normal IT certifications as a whole. [...]

• ict / computers, work

  Possibly the best comparison of RAID 0+1 vs. RAID 1+0

  10.14.09 | Permalink | Comment?

  Yes, very techie, but choosing RAID levels is always a bit of a process to find the right level or combination of levels. Today I had to do another analysis and make the choice, and while checking my data I found this great write-up: Difference between RAID 0+1 vs RAID 1+0 by Decypher Information Systems. [...]

• ict / computers, work

  Quick VMware tip: tracking snapshot delete progress

  07.25.09 | Permalink | Comment?

  I’ve built and actively manage a number of VMware ESX servers and server clusters, and one of the things that bug me is that as soon as I delete a snapshot I have no idea on its progress (especially if it’s a large snapshot, which can take quite a while). Here’s a quick tip to [...]

• ict / computers, networking

  Providing DHCP to multiple VLANs from one server

  06.17.09 | Permalink | 4 Comments

  Suppose you have a network with multiple VLANs, each with its own subnet, and you want your DHCP server(s) to serve addresses and configuration to all subnets (or at least more than one of them). The problem normally is that broadcast traffic (such as DHCP requests from clients) cannot traverse broadcast domains, which is exactly [...]

• books, ict / computers, networking, work

  Book tip: “Security in a Web 2.0+ World: A Standards-Based Approach” by Carlos Solari

  06.15.09 | Permalink | 1 Comment

  I went to hear Carlos Solari speak here in The Netherlands last week, and his message makes a lot of sense: to create truly secure infrastructures, devices and services, all components must be built using the ‘SBD’ or Security By Design principles. Solari and his team put forth the view that to create a fully [...]

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