Replicating Data

A step by step guide on how to start replicating data between Kafka clusters with SRM.

In SRM a replication can be set up with the help of the srm-driver and srm-control tools.

Verify that SRM is configured correctly. Make sure that connection information for each Kafka cluster is added as well as at least one source->target replication is specified and enabled.

Launch SRM with the srm-driver tool.
```
srm-driver
```
Alternatively, if you want to use a properties file other than the default, you can do so with the --config option.
```
srm-driver --config [path/to/srm.properties]
```
The driver connects to the clusters defined in your configuration. However, data replication is not yet started.
Update the topics whitelist to start data replication.
```
srm-control topics --source [SOURCE_CLUSTER] --target [TARGET_CLUSTER] --add [TOPIC1],[TOPIC2]
```
Alternatively, if you want to use a properties file other than the default, you can do so with the --config option.
```
srm-control --config [path/to/srm.properties] topics --source [SOURCE_CLUSTER] --target [TARGET_CLUSTER] --add [TOPIC1],[TOPIC2]
```
note
If required, instead of listing the topics that you want to add, you can also use regular expressions to add multiple topics with one command.

The topics you specify with the --add option are added to the topic whitelist and are replicated to the specified target cluster.