Will Vertica Data Repository servers allow ntpd instead of chrony?

Document ID : KB000016737
Last Modified Date : 14/02/2018
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Introduction:

Default build in the environment continues to utilize ntpd instead of the newer replacement chrony. 

Question:

Will Vertica Data Repository servers allow ntpd instead of chrony?

Environment:
r3.2 and newer releases onlyDoes not apply to r3.1 and older releases
Answer:
  • Using xntpd should be just fine, as long as it can keep the time correct on the server. CA documented chrony as a requirement due to it being the new default on RHE7 installs, replacing xntpd. 
  • A FAIL message will be observed in the dr_validate script run if the chrony package is not installed. 
  • If the dr_validate script finds chrony installed it will enable and start it as needed. 
  • If you have installed chrony but wish to keep it disabled in favor of ntpd you may need to stop/disable it after running the dr_validate script. 
  • The Vertica installer checks for ntpd, ntp and chronyd. As long as one is present and running, or able to be started and run, it should install.