Windows Time Server


3.2.2 System Variables
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System Variables
Name
Procedure
Leap Indicator
sys.leap
clock update
Stratum
sys.stratum
clock update
Precision
sys.precision
system
Root Delay
sys.rootdelay
clock update
Root Dispersion
sys.rootdispersion
clock update
Reference Clock Ident
sys.refid
clock update
Reference Timestamp
sys.reftime
clock update
Local Clock
sys.clock
clock update
Clock Source
sys.peer
selection
Poll Interval
sys.poll
local clock
Cryptographic Keys
sys.keys
authentication
 
Table 1. System Variables  

Table 1 shows the complete set of system variables. In addition to the common variables described previously, the following variables are used by the operating system in order to synchronize the local clock.

Local Clock (sys.clock): This is the current local time, in timestamp format. Local time is derived from the hardware clock of the particular machine and increments at intervals depending on the design used. An
appropriate design, including slewing and skew-Compensation mechanisms, is described in Section 5.

Clock Source (sys.peer): This is a selector identifying the current synchronization source. Usually this will be a pointer to a structure containing the peer variables. The special value NULL indicates there is
no currently valid synchronization source.


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