Time Synchronization User's Guide

HP NonStop Time Synchronization User’s Guide Page 36 of 81
Default Value: 300000 (5 minutes)
Example: MaxReplyDeviation = 250000
MaxReplyWindow <value>
The amount of time, in milliseconds, for which the TimeSync process will wait for a
response from a time source. If a response is received outside of this window, it will be
discarded by the TimeSync process.
Value Range: 0 through 2147483647
Default Value: 5000 (5 seconds)
Example: MaxReplyWindow = 3000
MultiSource True | False
Controls whether the TimeSync process uses a single time source to obtain a reference
time, or if it obtains reference times from all defined sources simultaneously. If this value
is set to False, TimeSync only communicates with a single time source, beginning with the
first TimeSource defined in the configuration file. If TimeSync cannot communicate with
that server, or receives an invalid reply, it moves to the next time source in the list until it
receives a valid response. If MultiSource is set to True, TimeSync sends a request to every
defined TimeSource each update interval. It then averages the times from those servers to
determine the correct system time.
In general, MultiSource should be set to False if you are accessing a reliable time source
such as an Internet-based NTP server or a local precision clock device. However, if instead
you are utilizing two or more local systems as your time sources, running in MultiSource
mode can yield a more accurate reference time than running in single-source mode. This
is the case because averaging reference times across systems will have the effect of
reducing the impact of any individual system clock inaccuracies.
Value Range: True or False
Default Value: False
Example: MultiSource = True
RetryInterval <value>
The frequency, in seconds, at which TimeSync will retry sending time synchronization