----- Original Message ----- I am not aware of a "best practice" ntp doc for ovirt. There is plenty of information about this over the net, search e.g. for "time sync in virtual machines" or something like that. AFAIK, one thing you should not do, for the time being at least, is assume that if you keep your hosts' clock synced, the VMs' will be too automatically. I think most people just treat VMs just as physical ones and run their favorite ntp client everywhere, pointing both hosts and guests at their organization's ntp server(s). That one (the organization's ntp server) some people tend to put on physical hardware (not a VM), which I guess makes some sense. Best, -- Didi