[LEAPSECS] Leap Sec vs Y2K

[Jonathan E. Hardis]

On Dec 11, 2010, at 12:36 PM, Ian Batten wrote:


> Well, except for Active Directory, which sets an upper bound of five  

> minutes on the maximum error.  In practice, an AD deployment in  

> which clocks were allowed to drift apart by minutes would behave  

> very badly, so the typical target is less than that.  Yes, in  

> principle, an AD deployment could synch to an artificial time, or  

> indeed to whatever time the AD masters drifted to (although, as  

> they'd be drifting independently, there would be all sorts of  

> problems with doing that, such as what happens to the clocks of  

> clients when they switch from one slave server to another).  In  

> reality, it's much easier to synch to UTC or its local realisation  

> than to some private timescale, especially in multi-site  

> deployments.  So I doubt there are many Windows networks of any  

> scale that don't synch their clocks.

>

> Still, it's not as though either Windows or AD are widely used.


N.B.:  Windows computers bound to a domain synchronize to a domain  
controller, and ultimately to the primary domain controller.

http://support.microsoft.com/kb/816042

      - Jonathan