[libvirt-users] qcow2 performance

2012-02-05 Thread Stefan G. Weichinger
Greets, I have to research performance-issues of a W2003-VM within KVM. Right now it's a qcow2-image-file w/ default settings within libvirt (configured by vmm ...) My question: what caching to use? writeback/writethrough/etc ... what to use for data integrity while not getting ultraslow per

[libvirt-users] Performance issues with KVM

2012-02-05 Thread Jatin Kumar
Hello, We are using libvirt over KVM. If we run a single virtual machine on a host then the performance is very good but if more than one vm (with 1:1 provisioning) runs on same host the performance is very poor (specially in case of parallel programming). libvirt version: 0.9.2 qemu-kvm-0.14.1 W