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Does RAC work with NTP (Network Time Protocol)?

April 26, 2017Network NTP Protocol RAC time

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Does RAC work with NTP (Network Time Protocol)?

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YES! NTP and RAC are compatible, as a matter of fact, it is recommended to setup NTP in a RAC cluster, for Oracle 8i/9i and 10g.From the Documentation:Oracle Database Oracle Clusterware and Oracle Real Application Clusters Installation Guide 10g Release 2 (10.2) for Linux B14203-05page 2-21:”Node Time RequirementsBefore starting the installation, ensure that each member node of the cluster is set as closely as possible to the same date and time. Oracle strongly recommends using the Network Time Protocol feature of most operating systems for this purpose, with all nodes using the same reference Network Time Protocol server.”Each machine has a different clock frequency and as a result a slightly different time drift. NTP computes this time drift within about 15 minutes, and stores this information in a “drift” file, it then adjusts the system clock based on this known drift as well as compares it to a given time-server the sys-admins sets up. This is the recommended approach.Keep the fol