Unclear extractor options

I am attempting to create an extractor. So far, so good, however there are two options that do not appear in documentation and I do not understand what they do.

  • Named captures only
  • Extraction strategy

Q: What do these options do?

he @NominaSumpta

welcome to the community. Named captures only is for Grok based extractors. This means that you will get only fields extracted that you give a name and not all possible matched fields.

Examples first with Named captures only unchecked and second with checked.

(I have used https://grokdebug.herokuapp.com/ for this)

It is very likely that you want the second option!

Docs https://docs.graylog.org/en/3.2/pages/extractors.html#using-grok-patterns-to-extract-data

for Extraction strategy - what is your exact question that is not answered by the text below that field?

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