Found very good site: steve.org.uk
Some interesting stuff:
Steve Kemp have also very interesting weblog .
We are using Xen 3.0.1 on Debian Sarge from several months. Working great. Finally there is an upgraded manual on HowtoForge – The Perfect Xen 3.0 Setup For Debian . Good. Also something else bring my attention: Setting Up A Highly Available NFS Server . We need this for live migrations – Xen need to get the OS filesystem image from the NFS, but it becoming a single point of failure. Anoter solution can be MogileFS – open source distributed filesystem.
Like a long time shot Parallax (cluster storage system under development by the Xen team with COW and snapshot features) seems pretty atractive.
_Update 28-03-2006: the last missing part from the setup was reliable database backend, found: Load-Balanced MySQL Cluster _
Q: I am experiencing a heavy slowdown of the entire dom0 and all other domUs if one domU gets under heavy load.Is there any way to tighten this domU by adjusting something like scheduling?
A: You can use elevator=cfq as the command line option for both the dom0 and domU kernels in grub.conf and /etc/xen domU config files respectively. This will force the use of cfq as the default scheduler. By default anticipatory is the scheduler in dom0 and noop in domU. Alternatively:
echo "cfq" > /sys/block/sda/queue/scheduler
