# Cassandra

>[Apache Cassandra®](https://cassandra.apache.org/) is a free and open-source, distributed, wide-column 
> store, NoSQL database management system designed to handle large amounts of data across many commodity servers, 
> providing high availability with no single point of failure. Cassandra offers support for clusters spanning 
> multiple datacenters, with asynchronous masterless replication allowing low latency operations for all clients. 
> Cassandra was designed to implement a combination of _Amazon's Dynamo_ distributed storage and replication 
> techniques combined with _Google's Bigtable_ data and storage engine model.
 
## Installation and Setup

```bash
pip install cassandra-driver
pip install cassio
```



## Memory

See a [usage example](/docs/modules/memory/integrations/cassandra_chat_message_history.html).

```python
from langchain.memory import CassandraChatMessageHistory
```