It seems highly likely (given that this is a dictionary and requires fast lookups) that you're reverse engineering something like CEVFS (i.e. a virtual file sys

It seems highly likely (given that this is a dictionary and requires fast lookups) that you're reverse engineering something like CEVFS (i.e. a virtual file system for compressing a database). Which is why the dictionary is broken into chunks... these are the compressed pages of the database.