[tahoe-lafs-trac-stream] [Tahoe-LAFS] #3956: Uploading a 20MB mutable fails in HTTP, but succeeds in Foolscap

[Tahoe-LAFS]

#3956: Uploading a 20MB mutable fails in HTTP, but succeeds in Foolscap
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     Reporter:  itamarst  |      Owner:
         Type:  defect    |     Status:  new
     Priority:  normal    |  Milestone:  HTTP Storage Protocol
    Component:  unknown   |    Version:  n/a
   Resolution:            |   Keywords:
Launchpad Bug:            |
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Comment (by itamarst):

 Coalescing is mostly OK, except! It's possible to do a write at an offset.
 So there will be holes, and when first creating a file a hole means null
 bytes (zeros), but later on it means "don't overwrite".

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Ticket URL: <https://tahoe-lafs.org/trac/tahoe-lafs/ticket/3956#comment:6>
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