search for: julianprice

Hi Please create a page on the wiki for a HowTo with the subject: "How to back up a running KVM guest" This will explain how to use LVM to take a snaphot of a KVM guest's virtual hard drive and rsync it to a remote backup server. I have a prototype running but there are still many issues to be resolved affecting performance, security, reliability, automation. I intend to

I have 2 similar servers. Since upgrading one from CentOS 5.5 to 6, disk write performance in kvm guest VMs is much worse. There are many, many posts about optimising kvm, many mentioning disk performance in CentOS 5 vs 6. I've tried various changes to speed up write performance, but northing's made a significant difference so far: - Install virtio disk drivers in guest - update the

On a 32bit Windows 2008 Server guest VM on a CentOS 5 host, iometer reported a disk write speed of 37MB/s The same VM on a CentOS 6 host reported 0.3MB/s. i.e. The VM was unusable. Write performance in a CentOS 6 VM was also much worse, but it was usable. (See http://lists.centos.org/pipermail/centos-virt/2012-August/002961.html) With iometer still running in the guest, I installed tuned on