anchor.diff:          02:00:00.000Z
   ....
   
  +Rerunning thus serves two purposes: besides the main use of rerunning
  +a slot, it can also be used to _backfill_ data.
  +
   === Continuous Delivery of Workflows
   
   Changing a workflow definition in Celos is as simple as updating the
  
positive.code: which, if they are "purely functional" will bring the system back to a
  mostly normal state.
  
  ==== Changing the schedule of a workflow
  
  Changing the schedule of a workflow (e.g. from "at the hour" to "5
  minutes past the hour") means that the existing slot files in the
  state database no longer line up with the workflow's (new) schedule,
  making them effectively lost.
  
  ==== Errors during job submission to Oozie do not bubble up into the UI
  
  If an error happens during job submission to Oozie (e.g. because the
  Oozie workflow directory is missing, or the workflow.xml contains a
  
negative.code: with no indication of error in the UI.  The log however, will contain
  the error.
  
  ==== The Celos name
  
  The link:http://www.quicksilver899.com/Tolkien/LOTR/LOTR_AC.html[_Lord
  of the Rings dictionary_] defines it as:
  
  ....
  Celos S; also Kelos; freshet; kel- flow away [Sil; *kelu-]; one would
  want to choose los snow [Sil] for the final element, but the text of
  Unfinished Tales, Index, entry Celos states the final form derives
  from Q -sse, -ssa, a form of emphasis [some say locative], making the
  definition 'much flowing' or 'freshet', often resulting from melting
  snow; perhaps 'snow' is then implied from the ending; a river in
  Gondor
  ....
  
  Alternatively, the
  link:http://programmingisterrible.com/post/65781074112/devils-dictionary-of-programming[_Devil’s
  Dictionary of Programming_] defines it as:
  
  ....
  Configurable: It’s your job to make it usable.
  Elegant: The only use case is making me feel smart.
  Lightweight: I don’t understand the use-cases the alternatives solve.
  Opinionated: I don’t believe that your use case exists.
  Simple: It solves my use case.
  ....
  
  === Related Tools
  
  Two similar, programmable schedulers:
  