The document (well ian's pdf copy....) describes that I "describe FASD, a 
fault-tolerant adaptive, scalable, distributed search engine inspired by
Freenet and designed with Freenet in mind. "

I think  the deletes (culling) of metadata a problem. First "whenever a node 
suspects that 'data' no longer exists". should be more specific (after a 
"404 error"?) wouldn't this in effect create a lot of culling floods for 
impopular data? Suppose by a LRU method both metadata and data would be out 
of the network. Now however some node finds the metadata but fails to find 
the data. what would network wise be more efficient: just drop the metadata 
or engage a protocol to delete a key across a lot of nodes? My feeling is 
that this would create a lot of trafic that would only result in 
propangation of data that is impopular. Since popular metadata for impopular 
data would have a lot of effect on the distibution of that data this will 
make it impossible to destroy this data.

This is positive for the survivabilty of the data but clashes with the 
limited resources of the entire network.

This sound a lot like "instead of deleting data in nodes store send it to 
the neighbour".

Just my 2 cents.

Maarten.






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