I want to upgrade memory of ES nodes in the cluster. I am having 3 nodes cluster, Node-1 is master+data, and Node-2 and Node-3 are only data node.
I was referring the instruction given at https://www.elastic.co/guide/en/elasticsearch/guide/current/_rolling_restarts.html
I am bit confused about first 2 steps. Its said that stop indexing if possible. What is relation between first step and second step.
Where should I set the transient variable before I shut down node 3? on master node I guess. right?
When I shut down and restart node-3, during that time, will that data be indexed only on node-1 and node-3? I hope indexing will not have any blockage during the maintenance/unavailability of node-3. Am I correct?