# Tracker Stores

All conversations are stored within a tracker store. Rasa Open Source provides implementations for different store types out of the box. If you want to use another store, you can also build a custom tracker store by extending the `TrackerStore` class.

## Contents

- [InMemoryTrackerStore (default)](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#inmemorytrackerstore-default)
- [SQLTrackerStore](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#sqltrackerstore)
- [RedisTrackerStore](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#redistrackerstore)
- [MongoTrackerStore](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#mongotrackerstore)
- [DynamoTrackerStore](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#dynamotrackerstore)
- [Custom Tracker Store](https://legacy-docs-v1.rasa.com/1.9.0/api/tracker-stores/#custom-tracker-store)

## InMemoryTrackerStore (default)

### Description

`InMemoryTrackerStore` is the default tracker store. It is used if no other tracker store is configured. It stores the conversation history in memory.

**Note**: As this store keeps all history in memory, the entire history is lost if you restart the Rasa server.

### Configuration

To use the `InMemoryTrackerStore` no configuration is needed.

## SQLTrackerStore

### Description

`SQLTrackerStore` can be used to store the conversation history in an SQL database. Storing your trackers this way allows you to query the event database by sender_id, timestamp, action name, intent name and typename.

### Configuration

To set up Rasa Open Source with SQL the following steps are required:

1. Add required configuration to your `endpoints.yml`:

```yaml
tracker_store:
    type: SQL
    dialect: "postgresql"  # the dialect used to interact with the db
    url: ""  # (optional) host of the sql db, e.g. "localhost"
    db: "rasa"  # path to your db
    username:  # username used for authentication
    password:  # password used for authentication
    query: # optional dictionary to be added as a query string to the connection URL
      driver: my-driver
```

2. To start the Rasa server using your SQL backend, add the `--endpoints` flag:

```bash
rasa run -m models --endpoints endpoints.yml
```

3. If deploying your model in Docker Compose, add the service to your `docker-compose.yml`:

```yaml
postgres:
  image: postgres:latest
```

### Parameters

- `domain` (default: `None`): Domain object associated with this tracker store
- `dialect` (default: `sqlite`): The dialect used to communicate with your SQL backend.
- `url` (default: `None`): URL of your SQL server
- `port` (default: `None`): Port of your SQL server
- `db` (default: `rasa.db`): The path to the database to be used
- `username` (default: `None`): The username which is used for authentication
- `password` (default: `None`): The password which is used for authentication

### Officially Compatible Databases

- PostgreSQL
- Oracle > 11.0
- SQLite

## RedisTrackerStore

### Description

`RedisTrackerStore` can be used to store the conversation history in [Redis](https://redis.io/). Redis is a fast in-memory key-value store which can optionally also persist data.

### Configuration

1. Start your Redis instance
2. Add required configuration to your `endpoints.yml`:

```yaml
tracker_store:
    type: redis
    url: <url of the redis instance, e.g. localhost>
    port: <port of your redis instance, usually 6379>
    db: <number of your database within redis, e.g. 0>
    password: <password used for authentication>
    use_ssl: <whether or not the communication is encrypted, default `false`>
```

## MongoTrackerStore

### Description

`MongoTrackerStore` can be used to store the conversation history in [Mongo](https://www.mongodb.com/). MongoDB is a free and open-source cross-platform document-oriented NoSQL database.

### Configuration

1. Start your MongoDB instance.
2. Add required configuration to your `endpoints.yml`:

```yaml
tracker_store:
    type: mongod
    url: <url to your mongo instance, e.g. mongodb://localhost:27017>
    db: <name of the db within your mongo instance, e.g. rasa>
    username: <username used for authentication>
    password: <password used for authentication>
    auth_source: <database name associated with the user’s credentials>
```

## DynamoTrackerStore

### Description

`DynamoTrackerStore` can be used to store the conversation history in [DynamoDB](https://aws.amazon.com/dynamodb/). DynamoDB is a hosted NoSQL database offered by Amazon Web Services (AWS).

### Configuration

1. Start your DynamoDB instance.
2. Add required configuration to your `endpoints.yml`:

```yaml
tracker_store:
    type: dynamo
    tablename: <name of the table to create, e.g. rasa>
    region: <name of the region associated with the client>
```

## Custom Tracker Store

### Description

If you require a tracker store which is not available out of the box, you can implement your own by extending the base class `TrackerStore`.