I’ve always had a bit of a love/hate relationship with computers, so it is not uncommon for me to go a few months feeling a bit apathetic towards them. Recently, I have been getting more into electronics and microcontrollers (it … Continue reading
While some articles may be timeless, depending on the type of content being published, many posts have a definite expiry date. It is the double edged sword of rapidly evolving technologies – they improve swiftly, but articles written about them … Continue reading
Like many others I have been drawn in by the appeal of websockets and their use in (near) real-time communication. As such one of my current projects uses Node.js and websockets (via socket.io). To maximize compatibility, I would, of course, … Continue reading
Note: this was done more as an experiment than for something I intended to use in production – so consider it to be more a compilation of notes than a full out procedure. DRBD – Distributed Replicated Block Device – … Continue reading
I use Varnish on my production server without any issues – it works quite well, and I have come to consider it an essential component in my server stack. I have recently been having a bit of trouble with a … Continue reading
Since I haven’t gotten around to playing with VMware or xen yet – VirtualBox is what I am using for virtualization in my test environment. Under Windows I like to use PuTTy to connect to my VMs – even those … Continue reading
When it comes to troubleshooting, it is ideal to be able to isolate each component of a system. In the case where multiple connected items are performing correctly, they can sometimes be grouped together – however, if one of these … Continue reading
One of the appeals of cloud computing is the idea of using what you need when you need. One of the ways that Amazon provides for this is through autoscaling. In essence, this allows you to vary the number of … Continue reading
In WordPress (v3.3), FORCE_SSL_LOGIN will transmit login credentials over SSL, however, the login page itself may be accessed over HTTP (as opposed to HTTPS). If the login page is accessed via HTTP, the user has no (easy) way of verifying … Continue reading
The intent of this article is to address a very specific case – it is not meant as a best practices guide. Scenario: A. You have a windows computer (Computer 1) with files that are remotely accessed from second windows … Continue reading
This was completed 2 weeks ago, but I am only now getting around to posting it online. This experiment was purely for the fun of it – I don’t own (or want) a cell phone, and have never used Android. … Continue reading
The notes for this have been sitting on my computer for almost 6 months, but a comment from today spurred me onto editing, updating, and posting them. Corosync is a messaging layer used for high-availability. It serves essentially the same … Continue reading
The t1.micro instance comes with only 602MB of memory. Especially under high load, it is quite easy to deplete the available memory – and since no swap space is enabled by default, this can quickly lead to a server becoming … Continue reading
My EC2 instances are setup to have only the operating system and program files on the root volume, with all other data (logs, mail, etc.) on a second EBS volume. This leads to a very stable root volume, which sees … Continue reading