[tahoe-dev] [tahoe-lafs] #1212: Repairing fails if less than 7 servers available

[tahoe-lafs]

#1212: Repairing fails if less than 7 servers available
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     Reporter:  eurekafag     |       Owner:                            
         Type:  defect        |      Status:  reopened                  
     Priority:  major         |   Milestone:  1.8.1                     
    Component:  code-network  |     Version:  1.8.0                     
   Resolution:                |    Keywords:  reviewed regression repair
Launchpad Bug:                |  
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Comment (by zooko):

 One possibility would be to make the behavior of uploader different than
 of repairer. Perhaps people prefer for their initial uploads to fail
 quickly and network-efficiently (principle 3) if they won't be able to
 achieve happiness level of {{{H}}}, but prefer for their repairs to
 proceed and do their best (principle 2). However, making the two behave
 differently would make things more complicated in the source code and
 would also make things more complicated in the usage, because principle 1
 -- ''idempotence'' -- would not apply to "first upload and then repair" or
 "first repair and then upload". Sometimes an upload would abort itself and
 return failure but then a subsequent repair would do a lot of work to make
 progress, or a repair would do a lot of work to make progress but then an
 upload would abort itself and return failure.

 Unless we are really sure that we need to support two different modes, I
 would prefer to err on the side of simplicity and find a mode that is good
 enough for both upload and repair. One good way to estimate "complication
 in usage" is to think how much documentation we would need to write to
 explain the different behavior of upload and repair in the different
 cases. :-)

-- 
Ticket URL: <http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1212#comment:27>
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