CPU Capacity for VirtualisationCPU Capacity for Virtualisation
Today a client asked me to advise him on how to dramatically reduce the number of servers for his business. He needs to go from 18 active servers to 4.[...]
Hosting a Xen ServerHosting a Xen Server
Yesterday I wrote about my search for a hosting provider for a Xen DomU [1]. One response was the suggestion to run a Dom0 and sell DomU’s to other people[...]
Xen HostingXen Hosting
I’m currently deciding where to get a Xen DomU hosted. It will be used for a new project that I’m about to start which will take more bandwidth than my[...]
IPSEC is PainIPSEC is Pain
I’ve been trying to get ipsec to work correctly as a basic VPN between two CentOS 5 systems. I set up the ipsec devices according to the IPSEC section of[...]
School Bag WeightSchool Bag Weight
Matt Bottrell has written about some issues related to the acceptable weight of laptops for school use [1]. Matt cites a reference from the Victorian government stating that a school[...]
Keith Olbermann on BushKeith Olbermann on Bush
http://youtube.com/watch?v=TEBpC0GLr6Y At the above Youtube page there is a video from MSNBC where Keith Olbermann discusses Bush’s record. Before I watched that I thought that it was impossible for me[...]
Installing a Red Hat based DomU on a Debian Dom0Installing a Red Hat based DomU on a Debian Dom0
The first step is to copy /images/xen/vmlinuz and /images/xen/initrd.img from the Fedora (or RHEL or CentOS) DVD somewhere convenient, I use /boot/OS/ (where OS is the name of the image)[...]
Xen and SwapXen and Swap
The way Xen works is that the RAM used by a virtual machine is not swappable, so the only swapping that happens is to the swap device used by the[...]
Security Flaws in Free SoftwareSecurity Flaws in Free Software
I just wrote about the system administration issues related to the recent Debian SSL/SSH security flaw [1]. The next thing we need to consider is how we can change things[...]
The New OLPCThe New OLPC
TED has a post about the design of the new OLPC [1]. I never liked the previous OLPCs [2], for my use a machine needs a better keyboard than the[...]