Hi, Update is delete and add. I mean, instead of updating existing document, it deletes it and adds it as new document. And those deleted documents are just marked as deleted and aren’t actually removed from index until the segment merge.
IDF doesn’t take those deleted-but-not-removed document into account (it counts those documents). That’s the reason you see different IDF score (you see both maxDocs and docFreq are incremented). Regarding 424 v.s. 0, the document had ID 424 (lucene’s internal ID). But when the document is updated (delete + add), it got new ID 0 in new segment. So, I think it’s not possible to keep score when you update documents. You can run optimise with max_num_segments=1 every time you update documents but it’s not practical (and until optimise is done, you see different score) Masaru -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to elasticsearch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/elasticsearch/etPan.54acade5.625558ec.13b%40citra.local. For more options, visit https://groups.google.com/d/optout.
