virtualization
Pay attention to the default IO scheduler
by specialj on Jun.01, 2010, under virtualization
With recent versions of Ubuntu running as Xen DomU’s I’ve noticed that the default scheduler is deadline. I’ve read documentation that noop should be the preferred scheduler. However, I make use of ionice, as do disk intensive programs such as fcheck. It’s not often noted but ionice only works with the cfq scheduler and because of that cfq is probably the best default for any system.
Running Xen on Various Linux Distributions
by specialj on Jan.29, 2010, under virtualization
I have been looking to various GNU/Linux distributions to determine their level of support for Xen. Here’s what I found:
- Debian Etch – Xen Hypervisor 3.2.1 (via backports), Linux kernel 2.6.26 (via backports)
- Debian Lenny – Xen Hypervisor 3.2.1, Linux dom0 kernel 2.6.26
- Debian Squeeze (testing) – Xen Hypervisor 3.4.2, Linux dom0 kernel ???
- Ubuntu 8.04 (Hardy) – Xen Hypervisor 3.3.0 (via backports), Linux dom0 kernel 2.6.24
- Ubuntu 8.10-10.04 (Intrepid-Lucid) – Xen Hypervisor 3.3.0, no Linux dom0 kernel
- OpenSuse 11.2 – Xen Hypervisor 3.4.1, Linux dom0 kernel 2.6.31
As much as I like Debian and Debian based distros I think OpenSuse is probably the best platform for hosting Xen at the moment.
