arctic Arctic TimeSeries and Tick store

Documentation Status Travis CI Join the chat at

Arctic is a high performance datastore for numeric data. It supports Pandas, numpy arrays and pickled objects out-of-the-box, with pluggable support for other data types and optional versioning.

Arctic can query millions of rows per second per client, achieves ~10x compression on network bandwidth, ~10x compression on disk, and scales to hundreds of millions of rows per second per MongoDB instance.

Arctic has been under active development at Man AHL since 2012.


Install Arctic

pip install git+

Run a MongoDB

mongod --dbpath <path/to/db_directory>

Using VersionStore

from arctic import Arctic
import quandl

# Connect to Local MONGODB
store = Arctic('localhost')

# Create the library - defaults to VersionStore

# Access the library
library = store['NASDAQ']

# Load some data - maybe from Quandl
aapl = quandl.get("WIKI/AAPL", authtoken="your token here")

# Store the data in the library
library.write('AAPL', aapl, metadata={'source': 'Quandl'})

# Reading the data
item ='AAPL')
aapl =
metadata = item.metadata

VersionStore supports much more: See the HowTo!

Adding your own storage engine

Plugging a custom class in as a library type is straightforward. This example shows how.


You can find complete documentation at Arctic docs



Arctic provides namespaced libraries of data. These libraries allow bucketing data by source, user or some other metric (for example frequency: End-Of-Day; Minute Bars; etc.).

Arctic supports multiple data libraries per user. A user (or namespace) maps to a MongoDB database (the granularity of mongo authentication). The library itself is composed of a number of collections within the database. Libraries look like:

A library is mapped to a Python class. All library databases in MongoDB are prefixed with 'arctic_'

Storage Engines

Arctic includes three storage engines:

Arctic storage implementations are pluggable. VersionStore is the default.


Arctic currently works with:

Operating Systems:


Arctic has been under active development at Man AHL since 2012.

It wouldn't be possible without the work of the AHL Data Engineering Team including:

Contributions welcome!


Arctic is licensed under the GNU LGPL v2.1. A copy of which is included in LICENSE