在 Elastic 中搜索多个索引时限制每个索引的大小

如何解决在 Elastic 中搜索多个索引时限制每个索引的大小

我一直在遵循这篇文章中的指导方针。我可以获得所需的输出，但在同一个 DSL 中如何限制每个索引的结果大小？

Full text Search with Multiple index in Elastic Search using NEST C#

POST http://localhost:9200/componenttypeindex%2Cprojecttypeindex/Componenttype%2CProjecttype/_search?pretty=true&typed_keys=true     
{
  "query": {
    "bool": {
      "should": [
        {
          "bool": {
            "filter": [
              {
                "term": {
                  "_index": {
                    "value": "componenttypeindex"
                  }
                }
              }
            ],"must": [
              {
                "multi_match": {
                  "fields": [
                    "Componentname","Summary^1.1"
                  ],"operator": "or","query": "test"
                }
              }
            ]
          }
        },{
          "bool": {
            "filter": [
              {
                "term": {
                  "_index": {
                    "value": "projecttypeindex"
                  }
                }
              }
            ],"must": [
              {
                "multi_match": {
                  "fields": [
                    "Projectname","Summary^0.3"
                  ],"query": "test"
                }
              }
            ]
          }
        }
      ]
    }
  }
}

解决方法

对于给定的查询，您可以使用聚合对每个索引的命中数进行分组和限制（在这种情况下，限制为 5）：

{
  "size": 0,"query": {
    ... Same query as above ...
  },"aggs": {
    "index_agg": {
      "terms": {
        "field": "_index","size": 20
      },"aggs": {
        "hits_per_index": {
          "top_hits": {
            "size": 5
          }
        }
      }
    }
  }
}