Starting DataStax Enterprise as a service

Starting the DataStax Enterprise service when DataStax Enterprise was installed from the DataStax Installer with the Services option or from a package.

Packaged installations provide start-up scripts in /etc/init.d for starting DataStax Enterprise as a service.

For Cassandra-only nodes in mixed-workload clusters or BYOH nodes, skip step 1.

The following entries set the type of node:

HADOOP_ENABLED=1 - Designates the node as a DSE Hadoop node and starts the Hadoop Job Tracker and Task Tracker services.
SOLR_ENABLED=1 - Starts the node as DSE Enterprise Search/Solr node.
SPARK_ENABLED=1 - Starts the node as DSE Enterprise Spark node.

Note: No entry is the same as disabling it.

Procedure

Edit the /etc/default/dse file, and then edit the appropriate line in this file, depending on the type of node you want:
- Cassandra nodes:
```
HADOOP_ENABLED=0
SOLR_ENABLED=0
SPARK_ENABLED=0
```
- BYOH nodes:
```
HADOOP_ENABLED=0
SOLR_ENABLED=0
SPARK_ENABLED=0
```
  BYOH node run in Cassandra mode.
- DSE Hadoop nodes:
```
HADOOP_ENABLED=1
SOLR_ENABLED=0
SPARK_ENABLED=0
```
- Solr nodes:
```
SOLR_ENABLED=1
HADOOP_ENABLED=0
SPARK_ENABLED=0
```
- Spark nodes:
```
SPARK_ENABLED=1
HADOOP_ENABLED=0
SOLR_ENABLED=0
```

Start DataStax Enterprise and the DataStax Agent:

$ sudo service dse start
$ sudo service datastax-agent start

To verify if your cluster is up and running:
```
$ nodetool status
```
On Enterprise Linux systems, the DataStax Enterprise service runs as a java process.