Upgrading a server to 64bit XenUpgrading a server to 64bit Xen
I have access to a server in Germany that was running Debian/Etch i386 but needed to be running Xen with the AMD64 version of Debian/Lenny (well it didn’t really need[...]
Category: Virtualisation
Virtualisation and cloud computing
Kernel issues with Debian Xen and CentOS KernelsKernel issues with Debian Xen and CentOS Kernels
Last time I tried using a Debian 64bit Xen kernel for Dom0 I was unable to get it to work correctly, it continually gave kernel panics when doing any serious[...]
Updated EC2 API Tools packageUpdated EC2 API Tools package
I’ve updated my package of the Amazon EC2 API Tools for Debian [1]. Now it uses the Sun JDK. Kaffe doesn’t work due to not supporting annotations, I haven’t filed[...]
Getting Started with Amazon EC2Getting Started with Amazon EC2
The first thing you need to do to get started using the Amazon Elastic Compute Cloud (EC2) [1] is to install the tools to manage the service. The service is[...]
Could we have an Open Computing Cloud?Could we have an Open Computing Cloud?
One of the most interesting new technologies that has come out recently is Cloud Computing, the most popular instance seems to be the Amazon EC2 (Elastic Cloud Computing). I think[...]
Killing Servers with Virtualisation and SwapKilling Servers with Virtualisation and Swap
The Problem: A problem with virtual machines is the fact that one rogue DomU can destroy the performance of all the others by inappropriate resource use. CPU scheduling is designed[...]
Xen and Linux Memory Assignment BugsXen and Linux Memory Assignment Bugs
The Linux kernel has a number of code sections which look at the apparent size of the machine and determine what would be the best size for buffers. For physical[...]
CPU vs RAMCPU vs RAM
When configuring servers the trade-offs between RAM and disk are well known. If your storage is a little slow then you can often alleviate the performance problems by installing more[...]
Xen CPU use per DomainXen CPU use per Domain
The command “xm list” displays the number of seconds of CPU time used by each Xen domain. This makes it easy to compare the CPU use of the various domains[...]
A New Strategy for Xen MAC AllocationA New Strategy for Xen MAC Allocation
When installing Xen servers one issue that arises is how to assign MAC addresses. The Wikipedia page about MAC addresses [1] shows that all addresses that have the second least[...]