[tahoe-lafs-trac-stream] [Tahoe-LAFS] #1440: drop-upload: don't perform redundant uploads when a file is quickly modified three or more times

[Tahoe-LAFS]

#1440: drop-upload: don't perform redundant uploads when a file is quickly
modified three or more times
-------------------------------------+-------------------------------------
     Reporter:  davidsarah           |      Owner:  daira
         Type:  enhancement          |     Status:  assigned
     Priority:  major                |  Milestone:  undecided
    Component:  code-frontend-drop-  |    Version:  1.8.2
  upload                             |   Keywords:  drop-upload performance
   Resolution:                       |  otf-magic-folder-objective2
Launchpad Bug:                       |
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Comment (by dawuud):

 I thought of a solution. Would something along these lines be acceptable?
 :

 We use an explicit dequeue implementation and we utilize a helping hash
 map to track currently queued files/dirs. Each time we add a file to the
 queue we first check if that file is already in the hashmap. We only add a
 file to the queue when it is not already in the hashmap. Likewise we must
 remove it from the hashmap once that queue item has been processed.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/1440#comment:7>
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