I have a ES cluster with nodes across data-centres with 1 coordinator node and 3 master+data nodes in each DC.
I have 2 questions here:
- Is it any harm in using nodes which are acting as both master and data?
- For minimum number of master nodes, as per the rule i should be mentioning 4 as min no. of nodes, but in that case, if in case something happens to one of the DCs, my cluster wont come back up. What is the suggested way to handle this scenario?