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LogScale Self-Hosted Deployment
This is an archived version of the documentation downloaded from LogScale Documentation Archives. Up to date documentation, and documentation for later versions, is available on LogScale Documentation

## Enabling Rack Awareness

You can set the `ZONE` environment variable to your zone. This setting affects aspects of the LogScale cluster such as storage replication, but is also used as the client rack for the `ingest-queue` and `transient-chatter` consumers. The `global` topic is very low traffic and is also very latency sensitive, so it does not support rack awareness.

If you prefer the client rack setting to be different from the `ZONE` setting for some reason, you can override it by setting the environment variable `KAFKA_CLIENT_RACK` to your zone.

For example, if in your Kafka broker configuration `broker.rack=rack5`, then you can set either `ZONE=rack5` or `KAFKA_CLIENT_RACK=rack5` for the nodes in that rack, and the consumers will start fetching from brokers that have that value in their `broker.rack` setting.

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