While attending LCA it occurred to me that the lecture notes from all the talks that I have given lack a copyright notice. So I now retrospectively license my lecture notes in the manner that probably matches what everyone was already doing. The Creative Commons web site has a form to allow you to easily […]
|
||||||
|
Today I have released a significant new version of my mail server benchmark Postal! The list of changes is below: Added new program bhm to listen on port 25 and send mail to /dev/null. This allows testing mail relay systems. Fixed a minor bug in reporting when compiled without SSL. Made postal write the date […] It appears that some people don’t understand what right-wing means in terms of politics, apart from using it as a general term of abuse. I recommend visiting the site http://www.politicalcompass.org/ to see your own political beliefs (as determined by a short questionnaire) graphed against some famous people. The unique aspect of the Political Compass is […] Firstly for smooth running of the presentations it would be ideal if laptops were provided for displaying all presentations (obviously this wouldn’t work for live software demos but it would work well for the slide-show presentations). Such laptops need to be tested with the presentation files that will be used for the talks (or pre-release […] echo 1 > /proc/sys/vm/block_dump The above command sets a sysctl to cause the kernel to log all disk writes. Below is a sample of the output from it. Beware that there is a lot of data. Jan 10 09:05:53 aeon kernel: kjournald(1048): WRITE block XXX152 on dm-6 Jan 10 09:05:53 aeon kernel: kjournald(1048): WRITE […] Recently there has been some really hot weather in Melbourne that made me search for alternate methods of cooling. The first and easiest method I discovered is to keep a 2L bottle of water in my car. After it’s been parked in the sun on a hot day I pour the water over the windows. […] As part of my work on Xen I’ve been playing with Xephyr (a replacement for Xnest). My plan is to use Xen instances for running different versions of desktop environments. You can’t just ssh -X to a Xen image and run things. One problem is that some programs such as Firefox do strange things to […] The issue of core file management has come up for discussion again in the SE Linux list. I believe that there are two essential security requirements for managing core files, one is that the complete security context of the crashing process is stored (to the greatest possible extent), and the other is that processes with […] Michael Davies recently blogged that all developers should have big screens. This news has been around for a while, the most publicity for the idea came from Microsoft Research where they did a study showing that for certain tasks a 50% performance increase could be gained from a larger monitor. If you consider that a […] disk = [ ‘phy:/dev/vg/xen1,hda,w’, ‘phy:/dev/vg/xen1-swap,hdb,w’, ‘phy:/dev/vg/xen1-drbd,hdc,w’, ‘phy:/dev/vg/san,hdd,w!’ ] For some work that I am doing I am trying to simulate a cluster that uses fiber channel SAN storage (among other things). The above is the disk line I’m using for one of my cluster nodes, hda and hdb are the root and swap disks for […] |
||||||