I've been managing out elasticsearch cluster for the past year and a bit. It grew from a single node that also ran kibana, logstash, and nginx, and stored our mysql backups to 9 data nodes, 1 client node, and a dedicated master. I have faced issues, but never had to rebuild the cluster. For the most part, reading up on the ES docs, and making a config change fixed the issue. Sometimes I've had to restart a node, but thats rare.
I've been managing out elasticsearch cluster for the past year and a bit. It grew from a single node that also ran kibana, logstash, and nginx, and stored our mysql backups to 9 data nodes, 1 client node, and a dedicated master. I have faced issues, but never had to rebuild the cluster. For the most part, reading up on the ES docs, and making a config change fixed the issue. Sometimes I've had to restart a node, but thats rare.