#8155 NORM 9.1.0: Implement hard links in datastore for storing duplicate files

[Zarro Boogs per Child]

#8155: Implement hard links in datastore for storing duplicate files
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 Reporter:  morgs        |         Owner:  tomeu        
     Type:  enhancement  |        Status:  new          
 Priority:  normal       |     Milestone:  9.1.0        
Component:  datastore    |       Version:  not specified
 Keywords:               |   Next_action:  design       
 Verified:  0            |     Blockedby:               
 Blocking:               |  
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 In #6729, skierpage commented:
 > I noticed that every time I start Browse, visit OLPC Library > images >
 world maps and click Africa (a PDF), another full copy of the PDF is added
 to ~olpc/.sugar/default/datastore/store by Read activity 45.  If I read
 this bug correctly, that behavior is a downside of this bug fix.

 This could be improved by hard linking identical files with copy-on-write
 to break the links.

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Ticket URL: <http://dev.laptop.org/ticket/8155>
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