As part of ES 5.x search after is introduced to assist in deep pagination. I would like to know some insights into the internal functional mechanism of search-after when compared to from-to . I am not looking for the usage rather I am interested in workings like what happens when search_after is used i.e how coordinating node queries the documents which avoids problems that arises in deep navigation
Hey,
the PR might help https://github.com/elastic/elasticsearch/pull/16125 - especially the changes in the query phase class.
--Alex
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