We have two use cases, forcing us to think about autoscaling in a way that we can have more nodes which have only replica shards.
- We use spot instances which can recycle (change) instance once a month. If these instances can hold replicas (only), we can add more nodes on spot for our cost.
- We have very inconsistent traffic, am thinking if it is possible to add more nodes during our peak hours which have only replicas.
I understand data movement can degrade performance, not sure if this is a right thing to do. Any help will be good, thanks.
We are on elasticsearch 6.3, 9 nodes cluster with 1 replica > 1TB data.