View the TimeKeeper Grandmaster, Compliance and Active Client deployment architecture which highlights that TimeKeeper clients get time via PTP or NTP from TimeKeeper grandmasters. In addition, TimeKeeper Compliance runs on your own hardware to collect client logs and generate reports and gets data from grandmasters. Also, Compliance instances communicate to share data between data centers and/or duplicate records for disaster recovery.
FSMLabs
Secure Enterprise Clock Sync
