Hot/Warm architecture question

Elastic Stack Elasticsearch
1

Hi everyone !

I am discussing Elasticsearch architecture with my team, and we wondered if the following setup would work :

  • 2 hot nodes
  • 2 warm nodes

As a constraint, each index would have 1 replica for high availability.
Let's say, one hot node break at a given time, would the other one serve the data and index new documents while we fix the broken node ? Or do we need to have 3hot/3warm for this use case ?

Best regards,

Richard

2

Yes, you only need two copies of each shard for HA, and therefore two data nodes in each tier. You do, however, need three master-eligible nodes. Here are some docs with more details.

3

Hi Mr. Turner,

Thank you for your quick answer.

Best regards.