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Jeff Tchang
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Interview Question: How would you architect Uber?
There was recently a thread on hacker news about what questions you would ask a software architect. One of the questions was how you would architect Uber: I would probably divide up the architecture into the following pieces: Driver App Passenger App Backen...

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Developing for the NRF51822 on Mac OS X
Over the weekend I worked on trying to get a development environment up and running for the Nordic nRF51822 system on a chip. This outlines how I did it: Need to Download Segger JLink. This is used to flash the board. J-Link Software and Documentation pack ...

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Google for Work Referral Codes
I occasionally get some promotion codes for Google Apps. These promotion codes give you $10 off per user for a year. Here are the instructions for redeeming: 1. Use my referral link ( http://goo.gl/2SJHuh ) 2. Use these redemption instructions . 3. Promotio...

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Troubleshooting rtorrent: Storage error: [File chunk write error: Invalid argument.]
So I decided to try and improve the performance of one of my VMs that was running torrents. Instead of using samba to mount the filesystem from inside the guest I went with QEMU / KVM's v9fs. The filesystem is actually called 9p or Plan 9 File System: https...

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Making your Windows KVM guest boxes fly with VirtIO
In order to extract the maximum performance out of a Windows guest OS on KVM / qemu you should install VirtIO. What is virtio? There are quite a few articles about it but basically it is like the VMWare Tools for KVM. It is a bunch of libraries that basical...

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Generating your own GPG key on Windows
Generating your own GPG key on Windows End to end encryption is important. One of the critical pieces is having your own public/private key pair. Here is how you generate one on Windows. Download gpg4win here: http://gpg4win.org/download.html The latest rel...

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