Re: [time-nuts] Leap second smear at Google

2013-09-21 Thread Tom Van Baak
 I don't know how elegant this solution from Google is

Christopher,

It's a clever, internal solution to the difficult problem leap seconds create 
in any large automated system. That blog entry is 2 years old. The issue has 
been discussed at length on the leap second mailing list; you can read the 
archives, if you have the time.

/tvb
www.leapsecond.com


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[time-nuts] Leap second smear at Google

2013-09-20 Thread Christopher Quarksnow
Besides the famous Android stint described in Google bug 5485
https://code.google.com/p/android/issues/detail?id=5485 that took 2 years
to fix, so many Android phones system clocks were 15 seconds fast then, I
just found the source of another discrepancy where Google spreads the leap
second offset to avoid artifacts with servers, platforms, environments or
programs unable to handle a sudden second leap :
http://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html

Maybe not as bad as Oracle in 2009 :
http://www.pcworld.com/article/156453/article.html

I don't know how elegant this solution from Google is, especially with
Google Wallet time payments or transactions that could be back-dated in
relation to a banking system, or other Google apps, but I thought it might
be of interest to some before they need a house of clocks to keep in sync
with Google on such days ! http://www.youtube.com/watch?v=xyRKQ84ztkE

Christopher Quarksnow
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Re: [time-nuts] Leap second smear at Google

2013-09-20 Thread John C. Westmoreland, P.E.
Christopher,

Obviously GOOG needs a time-nut on their staff!

Interesting stuff!
John W.



On Fri, Sep 20, 2013 at 6:48 PM, Christopher Quarksnow cquarks...@gmail.com
 wrote:

 Besides the famous Android stint described in Google bug 5485
 https://code.google.com/p/android/issues/detail?id=5485 that took 2 years
 to fix, so many Android phones system clocks were 15 seconds fast then, I
 just found the source of another discrepancy where Google spreads the leap
 second offset to avoid artifacts with servers, platforms, environments or
 programs unable to handle a sudden second leap :

 http://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html

 Maybe not as bad as Oracle in 2009 :
 http://www.pcworld.com/article/156453/article.html

 I don't know how elegant this solution from Google is, especially with
 Google Wallet time payments or transactions that could be back-dated in
 relation to a banking system, or other Google apps, but I thought it might
 be of interest to some before they need a house of clocks to keep in sync
 with Google on such days ! http://www.youtube.com/watch?v=xyRKQ84ztkE

 Christopher Quarksnow
 ___
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 To unsubscribe, go to
 https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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