On 2010-10-28, Parvin, Richard <[email protected]> wrote: > I've noticed that a lot of people use iburst on thier server lines. > I'm wondering why.
iburst == initial burst iburst causes ntpd to use a volley of 8 polls at 2 second intervals when a time server becomes reachable (e.g. at start up). ntpd needs to poll a remote time server a minimum of 4 times to collect enough data to choose it as the sys_peer (i.e. sync to it). The first poll occurs after ntpd initializes and resolves the server hostname. For this discussion we will assume the first poll takes place 5 seconds after ntpd is started. The default minimum poll interval (minpoll) is 64 seconds. Without iburst ntpd needs at least 5+(3*64) or 197 seconds (3m17s) for initial sync. With iburst ntpd needs at least 5+(3*2) or 11 seconds for initial sync. -- Steve Kostecke <[email protected]> NTP Public Services Project - http://support.ntp.org/ _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
