Modifying default _id field

Elastic Stack Elasticsearch
1

Hello,

We are working in an Index system with Elasticsearch.¡, and we would like to have our own _id fields, using a unique identifier obtained from the document to be inserted, so Elasticsearch drops a new insert in case this _id is already present in the system.

Roughly a single request unicity check, where the insert just fails to avoid duplication.

My question is, are we loosing performance at Elasticsearch level using our own crafted _id field?
Is the Index keeping up its performance in resharding operations?

Thanks for any advice.

2

Have a look at this blog post.

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