Parse 2 times csv files

Elastic Stack Elasticsearch
1

Hello,
I want to know how elasticsearch works when i parse 2 times the same csv file with the same data
Thank you

2

If you are using the same id for docs then it will reindex old data.
If you are using different ids or no id at all then new content will be added

3

How can i declare the id? Is this in the configuration file of logstash?

Thank you for your answer

4

Yes. See https://www.elastic.co/guide/en/logstash/current/plugins-outputs-elasticsearch.html#plugins-outputs-elasticsearch-document_id

5

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