FalkorDB

Note The team behind RedisGraph decided to take a stab at bringing this disruptive technology back to market.

We plan to rebrand it and release it as a stand alone product, following the same guidelines we have followed for the last 6 years:

Working in the open with the community

Always provide superior performance.

Easy to adapt

FalkorDB is the first queryable Property Graph database to use sparse matrices to represent the adjacency matrix in graphs and linear algebra to query the graph.

Primary features:

Adopting the Property Graph Model
- Nodes (vertices) and Relationships (edges) that may have attributes
- Nodes can have multiple labels
- Relationships have a relationship type
Graphs represented as sparse adjacency matrices
OpenCypher with proprietary extensions as a query language
- Queries are translated into linear algebra expressions

To see FalkorDB in action, visit Demos.

Quickstart

Trying FalkorDB
Build
Start
Use from any client
Documentation

Give it a try

To quickly try out FalkorDB, launch an instance using docker:

docker run -p 6379:6379 -it --rm falkordb/falkordb:edge

Once loaded you can interact with FalkorDB using any of the supported client libraries

Here we'll use FalkorDB Python client to create a small graph representing a subset of motorcycle riders and teams taking part in the MotoGP league, once created we'll start querying our data.

from falkordb import FalkorDB

# Connect to FalkorDB
db = FalkorDB(host='localhost', port=6379)

# Create the 'MotoGP' graph
g = db.select_graph('MotoGP')
g.query("""CREATE (:Rider {name:'Valentino Rossi'})-[:rides]->(:Team {name:'Yamaha'}),
                  (:Rider {name:'Dani Pedrosa'})-[:rides]->(:Team {name:'Honda'}),
                  (:Rider {name:'Andrea Dovizioso'})-[:rides]->(:Team {name:'Ducati'})""")

# Query which riders represents Yamaha?
res = g.query("""MATCH (r:Rider)-[:rides]->(t:Team)
                 WHERE t.name = 'Yamaha'
                 RETURN r.name""")

for row in res.result_set:
	print(row[0])

# Prints: "Valentino Rossi"

# Query how many riders represent team Ducati ?
res = g.query("""MATCH (r:Rider)-[:rides]->(t:Team {name:'Ducati'})
                 RETURN count(r)""")

print(row[0])
# Prints: 1

Building

Compiling

Requirements:

The FalkorDB repository: git clone --recurse-submodules -j8 https://github.com/FalkorDB/FalkorDB.git
On Ubuntu Linux, run: apt-get install build-essential cmake m4 automake peg libtool autoconf python3 python3-pip
On OS X, verify that homebrew is installed and run: brew install cmake m4 automake peg libtool autoconf.
- The version of Clang that ships with the OS X toolchain does not support OpenMP, which is a requirement for RedisGraph. One way to resolve this is to run brew install gcc g++ and follow the on-screen instructions to update the symbolic links. Note that this is a system-wide change - setting the environment variables for CC and CXX will work if that is not an option.

To build, run make in the project's directory.

Congratulations! You can find the compiled binary at bin/<arch>/src/falkordb.so.

Running tests

First, install required Python packages by running pip install -r requirements.txt from the tests directory.

If you've got redis-server in PATH, just invoke make test.

Otherwise, invoke REDIS_SERVER=<redis-server-location> make test.

For more verbose output, run make test V=1.

Building in a docker

The FalkorDB build system runs within docker. For detailed instructions on building, please see here.

Loading FalkorDB into Redis

FalkorDB is hosted by Redis, so you'll first have to load it as a Module to a Redis server. Redis 6.2 is required for FalkorDB 2.12.

We recommend having Redis load FalkorDB during startup by adding the following to your redis.conf file:

loadmodule /path/to/module/src/falkordb.so

In the line above, replace /path/to/module/src/falkordb.so with the actual path to FalkorDB's library. If Redis is running as a service, you must ensure that the redis user (default) has the necessary file/folder permissions to access falkordb.so.

Alternatively, you can have Redis load FalkorDB using the following command line argument syntax:

~/$ redis-server --loadmodule /path/to/module/src/falkordb.so

Lastly, you can also use the MODULE LOAD command. Note, however, that MODULE LOAD is a dangerous command and may be blocked/deprecated in the future due to security considerations.

Once you've successfully loaded FalkorDB your Redis log should see lines similar to:

...
30707:M 20 Jun 02:08:12.314 * Module 'graph' loaded from <redacted>/src/falkordb.so
...

If the server fails to launch with output similar to:

# Module /usr/lib/redis/modules/falkordb.so failed to load: libgomp.so.1: cannot open shared object file: No such file or directory
# Can't load module from /usr/lib/redis/modules/falkordb.so: server aborting

The system is missing the run-time dependency OpenMP. This can be installed on Ubuntu with apt-get install libgomp1, on RHEL/CentOS with yum install libgomp, and on OSX with brew install libomp.

Using FalkorDB

You can call FalkorDB's commands from any Redis client.

With `redis-cli`

$ redis-cli
127.0.0.1:6379> GRAPH.QUERY social "CREATE (:person {name: 'roi', age: 33, gender: 'male', status: 'married'})"

With any other client

You can interact with FalkorDB using your client's ability to send raw Redis commands.

Depending on your client of choice, the exact method for doing that may vary.

Python example

This code snippet shows how to use FalkorDB with raw Redis commands from Python via redis-py:

import redis

r = redis.Redis(host='localhost', port=6379, db=0)
reply = r.graph().query("CREATE (:person {name:'roi', age:33, gender:'male', status:'married'})")

Client libraries

Some languages have client libraries that provide support for FalkorDB's commands:

Project	Language	License	Author	Package	Comment
jfalkordb	Java	BSD	FalkorDB	Maven
falkordb-py	Python	MIT	FalkorDB	pypi
node-falkordb	Node.JS	MIT	FalkorDB	npm
nredisstack	.NET	MIT	Redis	nuget
redisgraph-rb	Ruby	BSD	Redis	GitHub
redgraph	Ruby	MIT	pzac	GitHub
redisgraph-go	Go	BSD	Redis	GitHub
rueidis	Go	Apache 2.0	Rueian	GitHub
ioredisgraph	JavaScript	ISC	Jonah	GitHub
@hydre/rgraph	JavaScript	MIT	Sceat	GitHub
php-redis-graph	PHP	MIT	KJDev	GitHub
redisgraph_php	PHP	MIT	jpbourbon	GitHub
redisgraph-ex	Elixir	MIT	crflynn	GitHub
redisgraph-rs	Rust	MIT	malte-v	GitHub
redis_graph	Rust	BSD	tompro	GitHub
rustis	Rust	MIT	Dahomey Technologies	Crate	Documentation
NRedisGraph	C#	BSD	tombatron	GitHub
RedisGraph.jl	Julia	MIT	xyxel	GitHub