Categories

Bonnie++

This version starts the re-write of Bonnie++! I will make it totally threaded (the new code does not use fork()). It will also support testing with a specified number of threads doing the same test, this will allow you to really thrash those RAID arrays!

bonnie++-2.00a.tgz – fixed a column assignment issue in bon_csv2html and […]

My Programming Profile

Job adverts are asking for a Github or Stack Overflow account nowadays, I don’t use those sites much so here’s a list of comparable resources:

Here is my list of Debian packages with their QA status. I’ve been a Debian Developer since November 2000.

Here is my Salsa profile, Salsa is the Debian equivalent to […]

Free Short Stories

Here are some free short science-fiction stories that I enjoyed reading:

Thoughts and Prayers by Ken Liu is an insightful story about trolling and the NRA types. Maneki Neko by Bruce Sterling is an interesting story about a networked gift economy, I’d like to join such a network! The Exterminator’s Want Ad by Bruce Sterling […]

ETBE Mon

ETBE Mon is my fork of the traditional Unix system and network monitoring system “Mon” by Jim Trocki. My aim with this fork is to take the best patches available for the existing Mon codebase and the best “contrib” monitoring scripts and include them in one package. I also aim to write all scripts necessary […]

ZFS Training Exercises

In 2015 I ran a training session on BTRFS and ZFS. Here are the notes for ZFS updated for the latest versions of everything when running on KVM. You can do all the same exercises on a non virtual machine, but it’s safest not to do this on a machine with important data. For the […]

BTRFS Training Exercises

In 2015 I ran a training session on BTRFS and ZFS. Here are the notes for BTRFS updated for the latest versions of everything when running on KVM. You can do all the same exercises on a non virtual machine, but it’s safest not to do this on a machine with important data. For the […]

TED Talks I Like

2004: Steven Levitt gave an interesting and surprising talk about the economics of crack dealing. 2009: Dan Pink gave an interesting talk about motivation disproving many theories related to the effectiveness of financial incentives 2013: Greg Asner gave an interesting talk about ecology with some ground-breaking visualisation. Everything by Dan Ariely, he talks about […]

ZFS and BTRFS

This article was published in Linux Journal in 2014 [1].

BTRFS and ZFS are two options for protecting against data corruption.

Which one should you use, and how should you use it?

For a long time, the software RAID implementation in the Linux kernel has worked well to protect data against drive failure. It provides […]

RAM Speed according to Memtest86+

Here are some speed results for RAM according to Memtest86+ on some machines that I have run. Note that the reported speed varies between runs by a few percent.

Thinkpad 600e PentiumII 400Mhz PC-66 RAM (2 DIMMs) 174MB/s Compaq P3-866MHz PC133 RAM (3 DIMMs, 2*128 + 256) 190MB/s Compaq Athlon 1GHz PC133 RAM (3 DIMMs) […]

DKIM and Mailing Lists

The Problem

DKIM is a standard for digitally signing mail to prove it’s authenticity and prove that it was not modified. In an ideal situation it can be used to reject corrupted or forged messages.

DMARC and ADSP are standards for indicating that mail from a domain should be signed. This prevents hostile parties from […]