Storage backend using RocksDB database

[windelbouwman]

Storage backend using RocksDB database

[windelbouwman]

This looks nice!

Having a database backed datastore is very good. Also the key-value pair is handy. It would be nice to be able to change the database, so the key-value API would be a good abstraction for the database.

[TimonTerBraak]

I am writing the layer on top on the Python rocksDB API to be able to read/write the nodes of the btree. That seems to work fine. However, the data structure manipulations are not implemented. That should remain in the btree class.

API is then something like this:

key = addNode(self, left = -1, right = -1, aggregation = [])
key = addLeaf(self, samples)
get(self, key)