[tahoe-lafs-trac-stream] [tahoe-lafs] #393: mutable: implement MDMF

[tahoe-lafs]

#393: mutable: implement MDMF
-------------------------+-------------------------------------------------
     Reporter:  warner   |      Owner:  zooko
         Type:           |     Status:  new
  enhancement            |  Milestone:  1.9.0
     Priority:  major    |    Version:  1.0.0
    Component:  code-    |   Keywords:  newcaps performance random-access
  mutable                |  privacy gsoc mdmf mutable backward-
   Resolution:           |  compatibility forward-compatibility review-
Launchpad Bug:           |  needed
-------------------------+-------------------------------------------------

Comment (by zooko):

 Brian asked me on IRC to investigate the first-segment/last-segment logic
 to make sure we don't have off-by-one errors, etc., in there. I started
 reading
 [source:trunk/src/allmydata/mutable/publish.py?annotate=blame&rev=5231#L1266
 TransformingUploadable]. Then I decided that I needed to understand what
 the behavior ''should'' be, so I stopped reading
 {{{TransformingUploadable}}} and started writing down what I thought the
 result should be for the the first-segment/last-segment logic. These notes
 turned into Python code, which I will attach under the name
 "choose_segs.py"...

 I'll come back and look at this some more tomorrow.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/393#comment:161>
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