On Tue, Nov 3, 2009 at 4:14 PM, Paul Gilmartin <[email protected]> wrote:
>> This is cheating. Sure, if you assume the operating system has the >> right time, you just ask there... >> > So it's cheating to ask your own OS, but not cheating to ask > a remote OS? What if your system lacks network connection? You just don't simply ask anyone, you ask a complex of synchronized servers that have a close connection to an trusted source. Experience shows that sometimes the operator will set the z/VM LPAR TOD offset not using a reliable source.At that point your System z clock is still stable, but very wrong. For Linux on z/VM, the best approach is to make sure z/VM has the right time at IPL. When your applications really can't afford the typical drift of a System z, make the hardware steer the LPAR. That will make all Linux guests have the same clock. Often better than each trying to sync itself with the outside. Rob
