At https://www.elastic.co/blog/resiliency-elasticsearch I can read:
In Elasticsearch, we actively promote the use of dedicated master nodes
in critical clusters to make sure that there are 3 nodes whose only role
is to be master, a lightweight operational responsibility. By reducing
the amount of resource intensive work that these nodes do (no data
ingestion or search), we greatly reduce the chance of cluster
But at Role of dedicated master nodes when not elected I can read:
As a followup, any ratio guidelines for indexing nodes vs dedicated
masters. From what I can tell, it wouldn't make much sense to run with
only one-dedicated master node; if that node goes down, your whole cluster
So, how do you configure a 3 node cluster. Are there any priority setting about master election?
May be some like:
at master nodes: master priority 100
at data nodes: master priority 50
Thank you very much !