Introduction

cfxdb is a Crossbar.io Python support package with core database access classes written in native Python.

What is cfxdb?

The package allows direct in-memory data access from Python programs (including Jupyter notebooks) to CrossbarFX edge node data:

• Persisted WAMP event history

• Persisted router tracing data

• XBR market maker transactions database

• XBR network backend database

• WAMP session cache

• Custom user, embedded object databases

Built on zLMDB

cfxdb is built on top of zLMDB, which provides the object-relational mapping layer for LMDB, the lightning memory-mapped database.

Key Features

• High Performance: Direct memory-mapped access to data

• FlatBuffers Serialization: Efficient binary serialization

• Schema Definitions: Typed database schemas for Crossbar.io

• Python Native: Pure Python implementation for CPython and PyPy

Note

For the underlying database concepts and LMDB details, see the zLMDB documentation.