Hi, we use a 3-node master-eligible ES6 cluster, and we need to replace one of the nodes. I'm trying to follow the official doc here: https://www.elastic.co/guide/en/elasticsearch/reference/master/modules-discovery-adding-removing-nodes.html and I have a few questions:
- Is it better to bring the existing node down and then add the new one, or the other way around?
- Is it required to let the application use the new node as soon as possible or it can get away with using its current list of nodes which does not yet have the new one?
- Is it possible to run versions 6.8.3 & 6.8.6 in the same cluster?