Hi (apologies for the previous post in html - was scrubbed in the list digest) I've dug various posts and articles on host-guest time synchronization. I could not conclude why it might be better to use ntpd in a guest rather than a daemon that reads from kvmclock and having NTP running on the host only (assuming the guest OS is a recent linux and so the clock source is set to the paravirtualized kvm PVclock). any clarifications are welcome, thanks! Edoardo Comar Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU