Author Archives: Dan

October 5, 2015
10:05
by: Dan

Upgrades in Nova: The Details

Over the last few years, the Nova project has spent a lot of time on improving its story around live upgrades. We’ve made a lot of progress and done so with minimal disruption as we were figuring out how to … Continue reading →

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June 26, 2015
16:12
by: Dan

Upgrading Nova to Kilo with minimal downtime

Starting in Icehouse, Nova gained the ability to do partial live upgrades. This first step meant that control services (which are mostly stateless) could be upgraded along with database schema before any of the compute nodes. After that step was … Continue reading →

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March 22, 2015
21:49
by: Dan

Execuhitch on a 2012 BMW X5 M-Sport

Apparently, the X5 is about the most complicated “utility vehicle” to use for towing. I don’t know why BMW doesn’t make this easier, but they don’t. Their OEM hitch option is clearly an afterthought and looks terrible, especially on an … Continue reading →

Posted in Cars Tagged , , , ,

March 20, 2015
00:38
by: Dan

2007 Audi A4 LED DRL Conversion

There is no shortage of writeups online about converting a B7’s ugly yellow daytime running lights to LEDs. It was Nick’s that made me decide to do the actual conversion, and part of the reason why I decided to add … Continue reading →

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January 31, 2015
00:37
by: Dan

The magical sleeping development machine

For years now, I’ve preferred to do all my development on a dedicated machine. This means my desktop (or laptop, depending) is just a glorified terminal-and-editor-running appliance. It probably comes from years of crashing boxes during kernel development, but it … Continue reading →

Posted in Linux Tagged , , , , ,

November 26, 2014
23:10
by: Dan

Multi-room audio with multicast RTP

Our house has speakers in the ceiling in almost every room. This is not something I’ve had before, and was initially skeptical about usefulness and fidelity. However, I’ve actually been enjoying having the background music while working be spread further … Continue reading →

Posted in Hardware Tagged , , , , , ,

April 11, 2014
00:44
by: Dan

Don’t touch my Schiit!

As a work-from-home-er and a music fan, having good audio in my home office is important. Until recently, I’ve used my laptop to feed a two-channel amp and some decent speakers. A large collection of digital audio, combined with MPD … Continue reading →

Posted in Hardware, Linux Tagged , , , , ,

January 10, 2014
22:32
by: Dan

A Manual Tune Button for the LDG AT-7000

The LDG AT-7000 automatic tuner is very popular among Icom HF radio owners, especially those with IC-7000 and IC-706 radios. It’s small, simple, and works really well. The problem is, it’s so simple that it has no controls of its … Continue reading →

Posted in Radio Tagged , , , , ,

July 20, 2013
01:04
by: Dan

A brief overview of Nova’s new object model (Part 3)

In parts one and two, I talked about the reasoning for developing an object model inside of Nova, as well as showed a sample implementation for a toy object. In this part, I will examine parts of some “real” objects … Continue reading →

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July 12, 2013
18:23
by: Dan

A brief overview of Nova’s new object model (Part 2)

In Part 1, I described the problems that the Unified Object Model aims to solve within Nova. Next, I’ll describe how the infrastructure behind the scenes achieves some of the magic of making things easier for developers to implement their … Continue reading →

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