[Trac #65] Temporary filesystems should be in RAM

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#65: Temporary filesystems should be in RAM
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 Reporter:  wmb at firmworks.com  |        Owner:  marcelo
     Type:  defect             |       Status:  new    
 Priority:  high               |    Milestone:  BTest-1
Component:  kernel             |   Resolution:         
 Keywords:                     |  
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Comment (by wmb at firmworks.com):

 There are a lot of little files that really never need to go to backing
 store - lock files, auth files, files that get created and then deleted.

 Ideally, whatever scheme we choose would have the property that those
 items never hit the NAND FLASH.

 One approach that would give us the ability to implement a flexible policy
 would be to use unionfs to layer RAM over backing store, then periodically
 run a script to copy selected stuff down.  The script could filter out
 stuff that shouldn't go down, based on criteria like age, size, known
 names, memory pressure, you name it.

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Ticket URL: <http://dev.laptop.org/ticket/65#comment:10>
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