Cluster Verification Utility - Concepts and Details

Cluster Verification Utility - Concepts and Details

<<<<<<<<< cluvfy NTP >>>>>>>>>

cluvfy comp clocksync -n all -verbose
....
Result: Clock synchronization check using Network Time Protocol(NTP) passed
Oracle Cluster Time Synchronization Services check passed
Verification of Clock Synchronization across the cluster nodes was successful.

The Cluster Time Synchronization Service (CTSS) is one of the new processes in the Oracle Clustware 11gR2 layer , the CTSS is installed during the GRID infrastructure installation.

CTSS Daemon is responsible for the time management within the cluster. It makes sure each node in the cluster is using the same time. First, CTSS will determine if a Network Time Protocol (NTP) daemon is running in the system and if NTP is not running, then  CTSS will run in active mode and perform the same task as the NTP daemon. If NTP daemon is running,  CTSS will be started  in observer mode.

●● We need to check if there is a time difference on the nodes.
●● We need to make sure ntp is running properly and with -x option



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