Index creation templates

Elastic Stack Elasticsearch
1

I was wondering if I'm missing something here.
when an index is created on elasticsearch dynamically (from logstash, fluent, etc.), where does it get it's setting from (like shard amount, etc.)?
I was under the impression that it comes from the index templates, but I'm looking now at a brand new cluster, and I don't see any templates there, but still indices are being created.

so where do they get the settings from?

2

There are default values for index settings (5 primary shards and 1 replica shard) that are applied to new indices if nothing else is specified. Elasticsearch then uses dynamic mapping to determine the type of a field based on the first occurrence it comes across.

3

great. so if there is no specific template it uses the default values.
and if I need to override them, I have to create an appropriate index template. correct?

4

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