[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):

 Replying to [comment:76 davidsarah]:

 > Why have two ways to express that? I'd suggest just requiring the offset
 parameter to be omitted to get whole-file replacement.

 I worry about inconsistent behavior if we later allow {{{offset=append}}}
 or {{{offset=some-other-thing-that-isn't-really-an-offset-
 but-a-behavior}}}, since replacement would then behave differently than
 other operations that would otherwise be treated similarly by the API.
 That's not really well-founded, though, since we can always start to
 support {{{offset=replace}}} at that point (and in any case would want to
 think carefully about allowing {{{offset}}} to take strings that describe
 behaviors and have little to do with offsets as values). At the moment,
 what you suggest is a consistency improvement, and gives us more freedom
 in the future to add other parameters for high-level behaviors instead of
 overloading the {{{offset}}} parameter. Good suggestion; I'll work it into
 a patch. Thanks.

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/393#comment:78>
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