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2.2.6
Time Administration
Time administration is used to specify the time and the NTP settings for this system.
The server (all domains) uses the XSCF Unit clock as the reference time.
Note – The customer should decide the NTP server operating mode. For details on
NTP, see the NTP manuals.
The XSCF Unit can be optionally configured to be an NTP client. If you do not
configure the XSCF Unit as an NTP client, the XSCF Unit will run its internal
realtime clock (RTC) based on the setdate(8) command alone.
Domains can be configured to use a time-of-day management policy on an
individual basis, so that each domain can manage its own time-of-day in a different
manner. Domain time-of-day policies include:
If no time or date configuration is done on the Oracle Solaris OS domain (that is,
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you do not set up the system as an NTP client and you do not use the Oracle
Solaris OS date command to set the domain's date), the Oracle Solaris OS
domain will obtain its initial time-of-day from the XSCF Unit.
An Oracle Solaris OS domain can be set up as an NTP client with the XSCF Unit
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being the NTP server. In this case, the XSCF Unit must be set up as an NTP server.
In this case, the Oracle Solaris OS domain will obtain its initial time-of-day from
the XSCF NTP server, which will then be used to keep the Oracle Solaris domain
and the XSCF unit in sync.
An Oracle Solaris domain can be set up as an NTP client from an external NTP
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server. In this case, the initial time for Oracle Solaris OS will be obtained from the
XSCF Unit. If you connect the domain to an external NTP server, connect a high
rank NTP server that supplies the time at the same accuracy for the domain as for
XSCF.
If you use the Oracle Solaris OS date command to set the time on an Oracle
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Solaris OS domain, the time offset between the Oracle Solaris OS domain and the
XSCF Unit will be preserved over reboots. Whenever the Oracle Solaris OS
domain boots, its initial time-of- day will be the XSCF Unit time adjusted by the
time offset created the last time the Oracle Solaris OS date command was used
on the domain.
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SPARC Enterprise Mx000 Servers XSCF User's Guide • January 2012
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