Author Archives: Dan

July 12, 2013
17:19
by: Dan

A brief overview of Nova’s new object model (Part 1)

As discussed at the Havana summit, I have been working with Chris Behrens (and others) on the unified-object-model blueprint for Nova. The core bits of it made their way into the tree a while ago and work is underway to … Continue reading →

Posted in OpenStack Tagged , , , , , , ,

July 10, 2013
23:14
by: Dan

A tool for watching Zuul and Jenkins

In my work on OpenStack Nova, I often have multiple patches in flight somewhere on the CI system. When patches are first submitted (or resubmitted) they go into Zuul’s “check” queue for a first pass of the tests. After a … Continue reading →

Posted in OpenStack Tagged , , , , ,

April 22, 2013
21:45
by: Dan

Dan’s Partial Summary of the Nova Track

Last week, OpenStack developers met in Portland, OR for the Havana Design Summit. Being mostly focused on Nova development, I spent almost all of my time in that track. Below are some observations not yet covered by other folks. Baremetal … Continue reading →

Posted in OpenStack Tagged , , , , , ,

February 7, 2013
22:32
by: Dan

All your DB are belong to conductor

Well, it’s done. Hopefully. Over the last year, Nova has had a goal of removing direct database access from nova-compute. This has a lot of advantages, especially around security and rolling upgrade abilities, but also brings some complexity and change. Much … Continue reading →

Posted in Codemonkeying, Linux, OpenStack Tagged , , , ,

January 5, 2013
23:18
by: Dan

Managing ECX 2013 Logistics with Drupal

If you know me, you know that one of my favorite events each year is the Eagle Cap Extreme Sled Dog Race. No, I’m not a big fan of dogs, or sleds, but when you put the two together, you … Continue reading →

Posted in Linux, Radio Tagged , , , ,

August 8, 2012
03:01
by: Dan

9600 baud packet on a Kenwood TK-840

The Kenwood TK-840 is a nice commercial UHF radio that is starting to go for $50-$100 on eBay due to the fact that it is not narrow-band capable. It is happy in the ham bands, has a good screen, excellent … Continue reading →

Posted in Hardware, Radio Tagged , , ,

June 28, 2012
19:18
by: Dan

Field Day 2012

This past weekend was the 2012 ARRL Field Day, which is the biggest amateur radio event of the year in the US. The reason it’s called field day is that you’re supposed to get out into the field and operate … Continue reading →

Posted in Radio Tagged , , , , ,

May 9, 2012
15:26
by: Dan

Low-latency continuous rsync

Okay, so “lowish-latency” would be more appropriate. I regularly work on systems that are fairly distant, over relatively high-latency links. That means that I don’t want to run my editor there because 300ms between pressing a key and seeing it … Continue reading →

Posted in Codemonkeying Tagged , ,

March 14, 2012
02:52
by: Dan

The beauty of automated builds

Just about any developer knows that if you’ve got even a moderately complicated project, you have to have automated builds. This helps to ensure not only that the builds you provide to the public are consistent, but also that you … Continue reading →

Posted in Codemonkeying Tagged , , , , ,

February 8, 2012
21:06
by: Dan

Update your FT-817, FT-857, or FT-897 with the new 60 meter channel

In the US starting in 2003, amateurs have had a secondary allocation of five specific channels in the 60 meter band. Unlike most other allocations, these are restricted to phone emissions in upper sideband, with a maximum of 50 watts … Continue reading →

Posted in Hardware, Radio Tagged , , , ,