[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3801: Clarify behavior of overwriting in immutable uploads

[Tahoe-LAFS]

#3801: Clarify behavior of overwriting in immutable uploads
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     Reporter:  itamarst  |      Owner:  itamarst
         Type:  task      |     Status:  new
     Priority:  normal    |  Milestone:  HTTP Storage Protocol
    Component:  unknown   |    Version:  n/a
   Resolution:            |   Keywords:
Launchpad Bug:            |
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Comment (by itamarst):

 Switch from model where Foolscap connection going away causes disconnect
 to a timeout-based mechanism where BucketWriter stays alive until timeout,
 refreshed on new upload. This addresses #3793 somewhat in that there is
 only one BucketWRiter per sotrage index so less worries about concurrency.

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3801#comment:6>
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