Is it useless to have a hot, warm, and cold nodes running on the same server?

Elastic Stack Elasticsearch
,
1

Like the title suggests. I saw that in the ILM policy, it says that it's recommended to move the data to warm nodes.

image
image513×282 17.1 KB

So I made a Docker container dedicated to a warm node to move my data into, but the hot data and the warm data are on the same server. So is that setup useless?

Kindly share a reference related to this, because I haven't found anything exactly related to this.

Thank you.

2

I think the docs on data tiers broadly cover this.

Usually useless indeed, although technically not always useless. You could in principle have a single server with both fast NVMe and slower SSD or HDD storage attached, running a hot node and a warm node, allowing Elasticsearch to choose which storage to use for each shard. But that's pretty unusual. If you only have one kind of storage, no need for separate tiers.