[LEAPSECS] Google, Amazon, now Microsoft

Poul-Henning Kamp phk at phk.freebsd.dk
Sun May 31 10:28:59 EDT 2015

In message <087CC3E4-B63E-44BA-9AD6-22DCE13A314A at dotat.at>, Tony Finch writes:

>> The opererative detail is this:
>>    "Microsoft has determined that clocks on tens of thousands
>>    of servers globally running Azure should switch to the leap
>>    second at midnight in the time zone where they are based."
>> As far as I know, it is not like Microsoft has any choice, "local
>> midnight" is the only time their software makes it possible for
>> them to make sure that all servers jump at the same time.
>But they have servers in multiple locations, so if they are running on the
>local time zone they will not leap at the same time...

Welcome to the (probably painful) world of "heuristic handling of
leap seconds".

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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