[LEAPSECS] Google, Amazon, now Microsoft

Brooks Harris brooks at edlmax.com
Sun May 31 04:09:53 EDT 2015

On 2015-05-31 03:57 AM, Brooks Harris wrote:
> On 2015-05-31 02:41 AM, Poul-Henning Kamp wrote:
>> --------
>> In message <556A6BD2.50608 at edlmax.com>, Brooks Harris writes:
>>> I can't find any authoritative announcement or statement to this effect
>> >from Microsoft, [...]
>> Please note that this is *only* about Microsofts Azure cloud service,
> Yes, that's what that articles says, but what does Microsoft say?
>> (which according to rumours are mostly used to run Exchange servers).
> Indeed, rumors. What does Microsoft say?
>> This is *NOT* how your private/work Windows machine will behave,
> Well, that's my question. Sure, a single machine catches up when it 
> synchronizes to NTP. But what is Windows doing with the Leap Second 
> count in each timezone?
> The article I referenced earlier said "Applies To:" various Windows 
> Server versions - it doesn't mention Vista, Win 7, Win 8, etc.
> How the Windows Time Service Works
> https://technet.microsoft.com/en-us/library/cc773013(v=ws.10).aspx
> So, the timing mechanisms are complex, depending on Windows version, 
> hardware, and administration choices.
> My question is, if Azure is doing this, what is Windows itself doing?
>> for that no new information is available and the most recent
>> guidance was that "somewhere between a second and an hour later
>> the clock will step a second".
> "most recent guidance" from whom?
> As I understand it, the clock would step a second when it syncs with 
> NTP, but note there are apparently different capability NTP clients in 
> various Windows versions. But what happens in different timezones?
> -Brooks

This says it applies to Server versions and Win 7, 8, etc.

How the Windows Time service treats a leap second Print Print Email Email

It doesn't mention how it may apply to local time.



More information about the LEAPSECS mailing list