langchain/docs/extras/ecosystem/integrations/cassandra.mdx

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# Cassandra
>[Cassandra](https://en.wikipedia.org/wiki/Apache_Cassandra) 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-drive
```
## Memory
See a [usage example](/docs/modules/memory/integrations/cassandra_chat_message_history.html).
```python
from langchain.memory import CassandraChatMessageHistory
```