OSF

NAME

timed − Controls the time server daemon at system startup

SYNOPSIS

timed [-tM] [-n network] [-i network]

The timed daemon is the time server daemon. 

FLAGS

-i networkSpecifies networks to be excluded from clock synchronization. 

-MSpecifies that a machine can become the time server if the master time server becomes inoperative. 

-n networkSpecifies networks to be included in clock syncronization. 

-tEnables tracing of messages received in /usr/adm/timed.log. 

DESCRIPTION

The timed daemon is normally invoked at boot time by an entry in the inittab file.  The timed daemon synchronizes the host’s clock with those of other machines on the local area network that are also running the timed daemon.  The timed daemon slows the clocks of some machines and speeds up the clocks on other machines to create an average network time.  The average network time is computed from measurements of clock differences using the ICMP (Internet Control Message Protocol) timestamp request message. 

The service provided by timed is based  on a master/slave (client/server) scheme.  When timed is started on a machine, it asks the master timed daemon for the network time and sets the host’s clock to that time.  After that, the host accepts synchronization messages periodically sent by the master and calls the adjtime system call to perform the needed corrections on the host’s clock. 

The timed daemon also communicates with date in order to set the date globally, and with timedc, the timed control program. 

If the machine running the master ceases to function, a machine that is running the timed daemon with the -M flag becomes the new master timed daemon. 

FILES

/usr/sbin/timed
Specifies the command path

/var/adm/timed.log
Contains messages traced for the timed command

/var/adm/timed.masterlog
Contains the log file for master timed

RELATED INFORMATION

Commands:  date(1), timedc(8)

Functions:  adjtime(3), gettimeofday(3)