Assigning Different Data Tier to Indices on a Same Node

Hello, All

I understand a concept of different tiers for various types of indices (content data, Hot, Cold, etc.) but I cannot find any reference / documentation if there is a practical benefit to assign different indices a different tier on the same node . For example if there is a value of having countries index in data content tier, my_old_loggs index in a cold one and my_precious_customer_data in a Hot tier.

I created two very simple indices countries and countries_content and placed the latter into the content tier ("_tier_performance" : "data_content"). I populated both with a list of countries and noticed that in my case basic GET countries_content/_search returned the result normally 15% to 20% quicker than GET countries/_search.

But even if my tests are correct and there is a difference, will there be any benefit of applying such a separation in production with a small number of nodes (4-5) , please?

Elasticsearch 8.15