[tahoe-dev] [tahoe-lafs] #778: "shares of happiness" is the wrong measure; "servers of happiness" is better

[tahoe-lafs]

#778: "shares of happiness" is the wrong measure; "servers of happiness" is
better
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 Reporter:  zooko               |           Owner:  kevan
     Type:  defect              |          Status:  new  
 Priority:  critical            |       Milestone:  1.5.1
Component:  code-peerselection  |         Version:  1.4.1
 Keywords:  reliability         |   Launchpad_bug:       
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Comment(by kevan):

 It seems consistent enough with the current repairer, which (at first
 glance) does what you say.

 So, if I understand your point: the repairer's job is to attempt to repair
 an unhealthy file, and report its results -- presumably other code, if it
 desires, can then determine whether the repair was successful or not. I
 think that this makes sense, but the repairer (or at least the code I've
 skimmed before leaving for work) has an internal definition of what is
 healthy -- a file with all of its shares intact -- and what isn't. This is
 necessary, because otherwise the repairer wouldn't know when to attempt to
 repair a file, but I'd feel better if the repairer tried to use the same
 definition of healthy as the user, I guess.

 I realize that the same argument applies to {{{shares_of_happiness}}}, too
 (though perhaps less so -- though the repairer doesn't respect
 {{{shares_of_happiness}}} directly, it is likely to be indirectly
 respected in the sense that the reparier's threshold of health is probably
 stricter than {{{shares_of_happiness}}}, while the repairer's threshold of
 health does not care about the distribution of shares): it is really more
 a gripe with the way the repairer works in general than an issue specific
 to this ticket. Given that, I'm fine with that solution to this ticket.

 (apologies if this is less than clear: I wrote this on my way out the door
 to work :)

-- 
Ticket URL: <http://allmydata.org/trac/tahoe/ticket/778#comment:49>
tahoe-lafs <http://allmydata.org>
secure decentralized file storage grid