Hi all, We are doing a POC on indexing nested documents in expectation of reducing grouping overhead while querying time.
On Prod Indexing, we are using the traditional approach of reindexing the entire document if there is any change in any of the fields. [we reindex ~2cr documents per day, FYI] Solr Version: v9.6.1 But I have come across a caution in solr documentation: *DOC <https://solr.apache.org/guide/solr/latest/indexing-guide/indexing-nested-documents.html#:~:text=By%20way%20of%20examples%3A%20nested,%2F%20colors)%20and%20supporting%20documentation%20(>*, where it says: *Solr must internally reindex an entire nested document tree if there are updates to it.* Which means If a root or parent has 1000 child documents, even with a change in single document in any one of the fields, entire nested childs are reindexed, which is not good enough. This made us rethink of performance gains that we will have, if nested documents are used in production. If that's the case, pls let us know if there are any other solutions which would help us in performance gains. *Note:* We have already done POC on external file fields and In-Place updates where we found they are not impactful for our project. *Thanks & Regards,* *Uday Kumar*
