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  1. Couchbase Server
  2. MB-60141

[FTS] : Vector search query scores changes with different number of index partitions

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    Description

      Steps to reproduce

      1. Created a 4 node cluster with 1 kv node, 1 n1ql node and 2 search node

      2. Created a couchstore bucket named bucket1 and imported a dataset onto it

      3. Created a search index with with 2 mapping child fields and index partitions = 1

      1. field - content, type - text, searchable as - content, analyser - en
      2. field - vector, type - vector, searchable as - vector, dimension - 384, similarity metric - dot_product

      4. Ran a vector search query

      5. Increased the number of index partitions

      6. Ran the same vector search query, the score is different when the number of index partition changes

       

      Scores with index partitions = 1

       

      Scores with index partitions = 5

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            raghav.sk Raghav S K
            raghav.sk Raghav S K
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              Updated:
              Resolved:

              PagerDuty