Blog::Log » misc

Speaker at Scandinavian Web Developer Conference

stefan — Mon, 18 Jan 2010 05:32:02 +0000

I will share my experiences with Developing Large-Scale Websites using JavaScript on the upcoming Scandinavian Web Developer Conference 2010 in Stockholm, 24-25 May. I’m looking forward to it, it is great being back doing presentations – something I did frequently many years ago during the dot-com period.

Clone VirtualBox images (.vdi)

stefan — Thu, 17 Dec 2009 11:54:52 +0000

Just copying a VirtualBox .vdi file and the opening it results in the error:

Cannot register the hard disk ‘myhd.vdi’ with UUID {ABCD} because a hard disk ‘myhd2.vdi’ with UUID {ABCD} already exists in the media registry (‘path/VirtualBox.xml’).

The solution is to generate a new UUID for the copy. This is done using:

VBoxManage internalcommands setvdiuuid myhd2.vdi

iPhone Developer Meetup Stockholm

stefan — Fri, 02 Oct 2009 20:34:35 +0000

Just organized the first meetup of Sweden iPhone Developer User Group in Stockholm.

Presentations available here and a report from the evening at iphone24.se (in Swedish).

Copyright sign using numpad

stefan — Mon, 01 Dec 2008 12:28:27 +0000

Reminder to myself: to get a copyright-sign © hold ALT and type 0169 using the numpad.

Visio figures in LaTeX

stefan — Mon, 28 Jul 2008 07:18:44 +0000

This is one way to use figures made in Microsoft Visio in your latex (pdfLatex) document.

The first step is to get the figure as a PDF file. If you are using Visio 2007 you may use the PDF add-in from Microsoft. Another option is using Adobe Acrobat or the free PDFCreator.

When printing, select the figure and in the print dialog select the option to only print the current selection.

The problem is that the figures will use a whole page even if they’re small. You may either crop it (using a tool like pdfcrop) or specify a viewport when including the figure in the document.

To find out the viewport variables, convert the PDF to PostScript using pdf2ps. Now check the beginning of the file for a line like this:

%%BoundingBox: 56 368 446 551

This is the viewport variables to use when including the figure in the latex document:

\includegraphics[viewport = 56 368 446 551]{figure.pdf}

Or include it in a figure with caption that may be referenced:

\begin{figure}
	\begin{center}
		\includegraphics[viewport = 56 368 446 551]{figure.pdf}
	\end{center}
	\caption{Figure caption here}
	\label{myfigure}
\end{figure}

It may be referenced to in the text using e.g. Please see figure ~\ref{figure} for details. The tilde is used as a non-breaking space to avoid unfortunate linebreaks.

See this page for more details working with figures in Latex.

Preparing For EC2 Persistent Storage

stefan — Mon, 12 May 2008 18:54:03 +0000

Preparing For EC2 Persistent Storage.

Using LVM + DRBD + NFS + Heartbeat + VTun To Gain Data Persistence, Redundancy, Automatic Fail-Over, and Read/Write Disk Access Across Multiple EC2 Nodes.

Amazon Web Services lower costs

stefan — Wed, 23 Apr 2008 15:26:14 +0000

Amazon have started to do a lot things right lately. The 24×7 premium support, introducing the Service Health Dashboard, the latest improvements to EC2, and now lowering the data transfer costs:

Current data transfer price (through April 30, 2008)
$0.100 per GB – data transfer in
$0.180 per GB – first 10 TB / month data transfer out
$0.160 per GB – next 40 TB / month data transfer out
$0.130 per GB – data transfer out / month over 50 TB

New data transfer price (effective May 1, 2008)
$0.100 per GB – data transfer in
$0.170 per GB – first 10 TB / month data transfer out
$0.130 per GB – next 40 TB / month data transfer out
$0.110 per GB – next 100 TB / month data transfer out
$0.100 per GB – data transfer out / month over 150 TB