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Re:NoSQL Databases: What, Why and When by joe_the_user on Thursday March 31, 2011 @01:20PM (#2392508)
Well,

As far I can tell, it would be easier to add layers of indexes, data control, schema control, transactions and so-forth on top of something like Tokyo DB than it would be to take apart a SQL database.

Re:NoSQL Databases: What, Why and When by crux_ on Thursday March 31, 2011 @01:30PM (#2392567)
Easier, yes. But would it be better?

Layering transactions atop a key-value store would be very difficult to do efficiently, for example.