Starting with Oracle Exadata System Software release 19.1.0, Exadata database servers and storage severs running Oracle Linux 7 no longer use ntpd. Instead, chrony is used to synchronize the system clock on the servers with NTP servers. chrony can usually synchronize the system clock faster and with better time accuracy compared to ntpd.

When you upgrade from Oracle Linux 6 to Oracle Linux 7, the NTP server settings are migrated to chrony.

All Oracle Grid Infrastructure and Oracle Database releases certified with Oracle Linux 7 also support chrony.

Minimum requirements:

• Oracle Exadata System Software release 19.1.0