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2-90 SPARC Enterprise Mx000 Servers XSCF User’s Guide • December 2010

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, 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 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 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 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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Cooper M3000 Guide de l'utilisateur Page 130