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

[tahoe-lafs]

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

 attachment:393status39.dpatch fixes the fencepost error exposed in Brian's
 tests (which was the publisher not accounting for offsets that lie on
 segment boundaries when interpreting the results of {{{div_ceil}}}
 combined with the filenode code assuming that the segment size would be
 exactly {{{DEFAULT_MAX_SEGMENT_SIZE}}}, instead of the actual segment
 size, which is possibly a little larger so that it is a multiple of
 {{{k}}}). I also moved the {{{mutable-type}}} check to the
 {{{PutOptions}}} class (since the option parser seems like a good place
 for option parsing and validation :-) and caused invalid errors to throw a
 {{{usage.UsageError}}}, as suggested by davidsarah in comment:84.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/393#comment:85>
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