Documentation - Redise Pack

A guide to Redise Pack installation, operation and administration

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Synchronizing cluster server clocks to Network Time Protocol (NTP)

It is important to ensure all cluster node’s clock are synchronized using NTP. Without this synchronization, there may be problems with internal cluster communications and have downstream impacts.

When you initially install Redise Pack the install script asks for permission to configure a scheduled Cron job, which ensures that the server’s clock is always synchronized.

If you did not confirm configuring this job during the installation process, you must use the Network Time Protocol (NTP) regularly to ensure that all server clocks are synchronized.

To synchronize the server clock, run the command relevant to your host’s operating system. For example, in Ubuntu, the following command can be used to synchronize a server’s clock to an NTP server:
/etc/network/if-up.d/ntpdate

It is advisable to configure a scheduled Cron job that executes this command daily on all servers, if you did not confirm the automatic execution when prompted to do so by the install script.