Question

我在ES中有此文档，并且正在通过Kibana进行查看。

_score字段代表什么？

{
  "took": 2,
  "timed_out": false,
  "_shards": {
    "total": 11,
    "successful": 11,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 0.2876821,
    "hits": [
      {
        "_index": "order",
        "_type": "ACKNOWLEDGED",
        "_id": "9901234567",
        "_score": 0.2876821,
        "_source": {
          "applicationCode": "SAPS00",
          "orderId": "9901234567",
          "status": "ACKNOWLEDGED",
          "orderUpdatedDateTime": "2018-07-08T10:12:21Z",
          "totals": {
            "orderShippingTaxAmount": 3.5,
            "orderSubtotalTaxAmount": 12.55,
            "grandTotalTaxAmount": 15
          },
          "orderLines": [
            {
              "lineId": "1",
              "unitPriceTaxAmount": 5.45,
              "totalPriceTaxAmount": 10.67,
              "lineShippingTaxAmount": null
            },
            {
              "lineId": "2",
              "unitPriceTaxAmount": 2.45,
              "totalPriceTaxAmount": 8.67,
              "lineShippingTaxAmount": null
            }
          ]
        }
      }
    ]
  }
}

Answer 1

Elasticsearch中的_score是一种确定匹配与查询的相关程度的方法。 Elasticsearch使用的默认评分功能实际上是Lucene内置的默认评分功能，这是Elasticsearch在后台运行的功能。这是一篇描述得分的文章。

https://www.compose.com/articles/how-scoring-works-in-elasticsearch/

Elasticsearch在后台运行Lucene，因此默认情况下它使用 Lucene的实用计分功能。这是基于相似模型术语频率（tf）和反向文档频率（idf）使用向量空间模型（vsm）进行多项查询。

ES / Kibana中的_score是什么？

1 个答案: