---

id: io-cassandra-sink title: Cassandra sink connector sidebar_label: “Cassandra sink connector”

The Cassandra sink connector pulls messages from Pulsar topics to Cassandra clusters.

Configuration

The configuration of the Cassandra sink connector has the following properties.

Property

Name	Type	Required	Default	Description
roots	String	true	" " (empty string)	A comma-separated list of Cassandra hosts to connect to.
keyspace	String	true	" " (empty string)	The key space used for writing pulsar messages. Note: keyspace should be created prior to a Cassandra sink.
keyname	String	true	" " (empty string)	The key name of the Cassandra column family. The column is used for storing Pulsar message keys. If a Pulsar message doesn't have any key associated, the message value is used as the key.
columnFamily	String	true	" " (empty string)	The Cassandra column family name. Note: columnFamily should be created prior to a Cassandra sink.
columnName	String	true	" " (empty string)	The column name of the Cassandra column family. The column is used for storing Pulsar message values.

Example

Before using the Cassandra sink connector, you need to create a configuration file through one of the following methods.

• JSON

  
  {
     "configs": {
        "roots": "localhost:9042",
        "keyspace": "pulsar_test_keyspace",
        "columnFamily": "pulsar_test_table",
        "keyname": "key",
        "columnName": "col"
     }
  }
  
  

• YAML

  
  configs:
      roots: "localhost:9042"
      keyspace: "pulsar_test_keyspace"
      columnFamily: "pulsar_test_table"
      keyname: "key"
      columnName: "col"
  
  

Usage

For more information about how to connect Pulsar with Cassandra, see here.