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    • Leigh B. Stoller's avatar
      Merge the two state machines (batchstate and state) into a single · 2025e0bd
      Leigh B. Stoller authored
      state machine (state). All of the stuff that was previously handled by
      using batchstate is now embedded into the one state machine. Of
      course, these mostly overlapped, so its not that much of a change,
      except that we also redid the machine, adding more states (for
      example, modify phases are now explicit. To get a picture of the
      actual state machine, on boss:
      
      		stategraph -o newstates EXPTSTATE
      		gv newstates.ps
      
      Things to note:
      
      * The "batchstate" slot of the experiments table is now used solely to
        provide a lock for batch daemon. A secondary change will be to
        change the slot name to something more appropriate, but it can
        happen anytime after this new stuff is installed.
      
      * I have left expt_locked for now, but another later change will be to remove
        expt_locked, and change it to active_busy or some such new state name in
        the state machine. I have removed most uses of expt_locked, except those
        that were necessary until there is a new state to replace it.
      
      * These new changes are an implementation of the new state machine,
        but I have not done anything fancy. Most of the code is the same as
        it was before.
      
      * I suspect that there are races with the batch daemon now, but they
        are going to be rare, and the end result is probably that a
        cancelation is delayed a little bit.
      2025e0bd
    • Leigh B. Stoller's avatar
      Add login_failures tbale and failure slots to users table. Both are · be8b5f28
      Leigh B. Stoller authored
      for tracking login attacks.
      be8b5f28
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