On Tue, 11 Oct 2016 12:13:16 -0400, Mark Jacobs wrote:
>CVTLSO is all zero on our system, and we're using STP.
>
According to that white paper, it depends on how the HMC is configured.
A number of shops choose to set CVTLSO=0 and ignore leap seconds
(the "stering" option) because a (decreasing?) number of ISVs, including
(once?) IBM are inconsistent with each other and even within their own
product sets on conventions to deal with CVTLSO. If CVTLSO=0:
o It doesn't matter.
o Response-sensitive peripherals are not disturbed
http://members.iinet.net.au/~nathanael/ntpd/leap-second.html
Search for:
amazon google leap second
... even spreading the leap second over several hours cause perceptible
disruption.
>> -----Original Message-----
>> From: Mark Jacobs - Listserv
>> Sent: Tuesday, October 11, 2016 7:21 AM
>>
>> STP will recognize that a leap second has occurred, and slowly steer zOS
>> time to the actual time. Here's a good writeup on the process.
>>
>> https://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/WP102081
-- gil
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