Performance Magic

Ramblings from a Sysadmin

June 24, 2013

Debian squeeze => wheezy, IPv?

I pretty much run Debian stable at home for all my servers. KVM, NFS, FW/GW, Myth, etc. A few months ago (probably almost a year) I set up dual stack IPv6 and IPv4 at home and tunnelled over IPv4 to Hurricane Electric. Most things were working fine, I even had one host that was only IPv6 to try certain things out. Recently I finished upgrading everything from Squeeze to Wheezy. This went well (as it usually does), except for a few odd things that were happening around the network… ... Read more

April 1, 2013

backup my laptop securely – crashplan

I need to backup my laptop. Previously when using a Mac, I had a hard drive sitting in my office and would plug it in every morning and Time Machine would do it’s thing. A recent tweet by @rackerhacker said he was using crashplan, so I thought I would give it a go. Crashplan is pretty good if you pay for it. I am not so concerned about the ‘cloud’ storage, but would like incremental backups taken more often, so I could find files at previous dates and/or times, but that is not the major reason for me to have backups. ... Read more

January 20, 2013

The Phoenix Project – Review

I have been waiting in anticipation to buy a copy of Gene Kim’s “The Phoenix Project”, and when it was released last week, I wasted no time snapping up a copy. By no means am I a big reader, or a fast reader, I do have a high comprehension rate, and I generally stick to reading white papers, blog posts, Etc., as opposed to technical books, I have a few on my virtual shelf, and I have read them in one form or another (e. ... Read more

January 17, 2013

Route your mic to speakers – Ubuntu PulseAudio

When testing my microphone on my laptop for use with skype and google hangouts, I need a way to route the output to the speakers. Eventually I found this bug on launchpad: To sum it up: pactl load-module module-loopback latency_msec=10 (default is 200) this command will give you a number as output, for example 27. to stop the loopback execute: pactl unload-module 27 (replace 27 with the output of the previous command) ... Read more

January 8, 2013

Convert Percona Xtrabackup to mysqldump

Recently I needed to restore a MMM (MySQL MultiMaster) cluster after both databases become corrupted for various reasons. Evaluating the environment it was decided that we should use the current active node as a true state and use this as a replication point, and provide database backups so that transactions could be played back manually if required. We use Pecona Xtrabackup for a large number of clients and this was the case this time as well. ... Read more

January 7, 2013

The value ‘stable’ is invalid for APT::Default-Release

Over the Christmas break, as I pretty much do every Christmas holiday period, I upgrade my MythTV set-up. I pretty much stick to Debian for the OS and pull the MythTV packages from Debian Multimedia. Once upon a time I used to build MythTV from source and make my own packages, but I am getting lazy and time is becoming precious for me in other ways. So this time I decided to upgrade Debian testing (Wheezy) as it seems to be pretty stable and nearing completion, so that I could install 0. ... Read more

January 2, 2013

2013 the year to get shit done

For 2013 these are my goals: Code more Clean up my music and video collections Move all the home movies and photos to Dropbox Blog more Change all my website passwords and use Lastpass Read more Finish the house renovations/makeover Clean up the garage More involvement in the community (Devops, Mythtv, Debian, FIRST) stop noisy emails Backup my laptop / move important configuration to github/Dropbox Puppitise more infrastructure I look after

December 6, 2012

IPTV, IGMP and rp_filter

Having solved a very interesting multicast issue at work recently I decided it was once again time to have a go at getting IPTV working from my ISP TPG. I used to run Bering leaf, but never found a package or could be bothered building igmpproxy (which seemed to be the way to go) for leaf, and so have never really sat down and looked into getting IPTV working properly. ... Read more

December 4, 2012

CommVault Console on Linux

I look after backups using Commvault. While it isn’t my favourite backup product, it gets the job done, and does a pretty good job of it too. One big downside for me is the lack of a Linux console. Yes the GUI console application is a Java application packaged in a jar file, but unfortunately it is very Windows specific, to the point where it just doesn’t seem to work on Linux. ... Read more

November 22, 2012

How to install a new SSD in your laptop

So, I have previously had a SSD in another Laptop, but I had to go back to my Dell Latitude D630, and it still had spinning rust. I decided that a good speed boost and improve battery time a good investment would be a SSD. I managed to get an OZC Agility 4 256GB SSD for ~AU$170. This is a little how-to replace your hard drive in your laptop. Grab your new SSD and install it into a USB housing, and plug it in. ... Read more

© Greg Cockburn