System Clock Recommendations
All operating systems supported by InterSystems IRIS provide Network Time Protocol (NTP) clients, which keep the system clock synchronized to a reference system, as well as facilities that automatically adjust the system clock between daylight saving time and standard time.
It is recommended that you rely on the automatic clock management features of the operating system to keep the system clock synchronized and regulated rather than adjust the system clock manually.
If you must make manual time adjustments for tasks such as testing, be sure to use a test environment (rather than the production environment) when performing such tasks. Furthermore, manual adjustments should be made with care because non-chronological events – such as adjusting the clock forward or backward – may cause issues for some utilities.
