How to scale elasticsearch?

Question

Scalability

Good afternoon, I have a rancher and I need to configure 1 master node, three date nodes and 1 hq in it.
How does elastic interact with data nodes and how does it send data from the date to the client?
Can I speed up full text search with a specific rancher configuration? Or is it done by elastic configuration files?
I will be very grateful for answers.

Answer 1

What kind of HQ is not clear.

1. All elastic nodes accept client requests and redirect them to the required nodes with data, the response to the request is collected by the node that received it. More
   
2. Fine-tuning is done mainly inside the elastic (there is a curator for automation ), in the rancher you can only tweak the system settings and the JVM. The elastic config is solely responsible for the listening addresses and physical limits of a particular node, a la the percentage of disk full to disable recording, cluster settings are stored internally, a lot is set through environment variables.