How to know when increase the number of master nodes?

Hello everyone!

There is some guidelines to follow to scale my master nodes?
There is some metric to analyse to see if i need more master nodes on my cluster?

Thank you!

If you are using dedicated master nodes, 3 is generally the ideal number. There is generally no need to scale this up as your cluster grows.

The only reasons I can think of to move up to 5 or 7 dedicated master nodes is if you are deploying in a way that you want a dedicated master node per rack or Availability Zone and have more than 3 of these OR if you want to be able to lose more than one master node and still be able to have a fully functioning cluster.

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There can only be 1 active master, adding nodes help prevent split brain. All the others just receive updates for failover and are used to vote who is master

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