Setting system properties during startup

Use the system property (-D) switch to modify the DataStax Enterprise (DSE) settings during start up. To automatically pass the settings each time DSE starts, uncomment or add the switch to the jvm-server.options file.

Depending upon the JVM you are using, switches may be located in either jvm8-server.options or jvm11-server.options.

Metrics collection is enabled by default. To disable metrics collection, set -Dinsights.default_mode to disabled.

Synopsis

Change the start up parameters using the following syntax:

Command line:

dse cassandra -D<parameter_name>=<value>

jvm-server.options, jvm8-server.options, or jvm11-server.options file:
```
-D<parameter_name>=<value>
```

cassandra-env.sh file:

JVM_OPTS="$JVM_OPTS -D<parameter_name>=<value>"

Only pass the parameter to the start-up operation once. If the same switch is passed to the start operation multiple times, for example from both the jvm-server.options file and on the command line, DSE may fail to start or may use the wrong parameter.

Startup examples

Starting a node without joining the ring:

Command line:

dse cassandra -Dcassandra.join_ring=false

jvm.options:
```
-Dcassandra.join_ring=false
```

Replacing a dead node:

Command line:

dse cassandra -Dcassandra.replace_address=10.91.176.160

jvm.options:

-Dcassandra.replace_address=10.91.176.160

Disabling DSE metrics collection:

Command line:

// adoc partial file for content from ToolsWH.dita
// <section conkeyref="ToolsWH/cstressDefinition"/>
dse cassandra -Dinsights.default_mode=disabled

jvm-server.options:
```
-Dinsights.default_mode=disabled
```

Changing LDAP authentication retry interval from its default of 10 ms:

Command line:
```
dse -Ddse.ldap.retry_interval.ms=20
```
jvm.options:
```
-Ddse.ldap.retry_interval.ms=20
```

Cassandra system properties: Change DataStax Enterprise database native Cassandra system properties at startup.
Java Management Extension system properties: Change Java Management Extension system properties of the DataStax Enterprise database.
Search system properties: DataStax Enterprise Search system properties.
Threads per core system properties: Tune TPC using the Netty system parameters.
LDAP system properties for DataStax Enterprise Authentication: Change LDAP system properties.
Kerberos system properties: Change Kerberos system properties.
NodeSync system parameters: Tune NodeSync by setting the system properties at startup.
DSE Metrics Collector properties: Change DSE Metrics Collector JVM properties at startup.

Setting system properties during startup

Synopsis

Startup examples

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