[tahoe-dev] [tahoe-lafs] #800: improve alacrity by downloading only the part of the Merkle Tree that you need

[tahoe-lafs]

#800: improve alacrity by downloading only the part of the Merkle Tree that you
need
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 Reporter:  zooko        |           Owner:  somebody 
     Type:  enhancement  |          Status:  new      
 Priority:  major        |       Milestone:  undecided
Component:  code         |         Version:  1.5.0    
 Keywords:  easy         |   Launchpad_bug:           
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Comment(by zooko):

 I think it is okay for it to use more reads, so the test should be
 loosened to allow it to pass even if it does.  The existence of that test
 of the number of reads does serve to remind me, however, that multiple
 small reads of the of the hash tree *would* actually be a performance loss
 for small files.  We should do some more measurements of performance.
 Perhaps it would be a win to heuristically over-read by fetching a few
 more than the required number of hashes would be a a win.

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Ticket URL: <http://allmydata.org/trac/tahoe/ticket/800#comment:3>
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