[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 davidsarah):

 Replying to [comment:152 kevan]:
 > {{{self.datalength}}} is perhaps confusingly named -- it is the size of
 the
 > MDMF file if the update operation completes successfully, and is used to
 calculate
 > segment boundaries and to initialize the tail segment encoder (if the
 > tail segment differs in length from the other segments).

 I suggest {{{new_length}}} for this.

 > {{{self.datalength}}} should be calculated as in your first example.
 Actually, due
 > to a bug in {{{TransformingUploadable}}}, it is calculated that way --
 for
 > whatever reason, I wrote {{{TransformingUploadable.get_size}}} to return
 {{{offset + get_size}}}.

 I'm not surprised I was confused! ;-) Thanks for the explanation.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/393#comment:154>
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