Looking at the documentation cat nodes API | Elasticsearch Guide [8.11] | Elastic It appears that a "Hot" node should have roles hd ... but that's not true in real life. Is a hot node not a "data" node? Are 'data_content' nodes not considered 'data' nodes?
Generally no, see these docs:
In a multi-tier deployment architecture, you use specialized data roles to assign data nodes to specific tiers:
data_content,data_hot,data_warm,data_cold, ordata_frozen. A node can belong to multiple tiers, but a node that has one of the specialized data roles cannot have the genericdatarole.
No data_content is different from data. It's abbreviated as s (I forget why)
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