Foreign Keys

Not Supported

Query Interface

SQL

System Architecture

Shared-Nothing

Nebula Graph adopted the shared-nothing distributed architecture in storage so nodes do not share memory or storage, which means there are no central nodes in the whole system.

The binary of storage service is nebula-storaged, which provides a key-value store. Multiple storage engines like RocksDB and HBase are supported, with RocksDB set as the default engine.

Raft is implemented as the consensus algorithm.

Storage Model

Custom

Checkpoints

Consistent

Data Model

Graph

Nebula Graph uses property graph as its data structure and requires strong schema for data storage.