CODEWITHSUNDEEP
searchelasticsearch
user3351014
user3351014

Reputation: 185

Elastic search - How to increase the _score in elastic search document

I have a document with less _score which is not retrieved at the query time when i give size:100. I need to make the document available in top 25 results. How to achieve this ? Is there any option to increase the _score manually ?

Upvotes: 1

Views: 1597

Answers (1)

Mysterion
Mysterion

Reputation: 9320

I will describe one of the possible ways to do the trick

You could use function_score to boost the score based on some functions:

The function_score query provides several types of score functions.

script_score

weight

random_score

field_value_factor

decay functions: gauss, linear, exp

Example, that will use the field_value_factor to boost the score by multiplying the score:

{
  "query": {
    "function_score": {
      "query": {
        "match_all": {}
      },
      "script_score": {
        "script": "_score * doc['popularity'].value"
      },
      "boost_mode": "multiply"
    }
  }
}

To enable this dynamic scoring you need to alter your yml config file with lines depending on the version of Elastic:

It's either (at least it's the way for 2.4)

script.inline: true
script.indexed: true

or something like:

script.disable_dynamic: false

For more information regarding dynamic scripts - https://www.elastic.co/guide/en/elasticsearch/reference/2.4/modules-scripting.html#enable-dynamic-scripting (you could select the version of Elastic that you are using)

For more inromation on function score and types of functions: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html

Upvotes: 1

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