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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => kilo-1

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https://bugs.launchpad.net/bugs/1276203

Title:
  Period task interval config values need to be consistent

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Currently we have a mix of “==0” and “<=0” being used inside periodic
  tasks to decide to skip the task altogether.   We also have the
  “spacing=” option in the periodic_task decorator to determine how
  often to call the task, but in this case:  ==0 means “call at default
  interval” and <0 means “never call”.     It would be nice to make
  these consistent so that all tasks can use the spacing option rather
  than keep their own check on when (and if)  they  need to run.

  However in order to do this cleanly and not break anyone that is currently using “0 “ to mean “don’t run” we need to:
  -	Change the default values that are currently 0 to -1
  -	Log a deprecation warning for the use “*_interval=0”

  And then leave this in place until Juno before making the change

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