We need to remove part of the fields from the documents to shrink the index
After some googling my conclusions are:
- there is no much choice and we have to reindex documents.
- it worse to do it using scan and bulk update api's.
My questions is - what is the best way to edit document:
One way I see is to get the the _source field and edit it.
While another way I'm considering is to use the partial_fields option,
which actually looks a way more convenient to deal with.
The problem is I'm not sure that the whole information that needed to
reindex the document in the proper way will exist in the returned results. *In
other words can I use the returned fields to reindex without loosing the
information or I have to use _source? *
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