ES按名称查询数据时，相同名称的数据评分不同问题

问题原因：es索引是分片存储的，查询计算评分的时候，是每个分片单独计算的，所以会出现相同名称的人员评分不同的问题、

解决方案：

1、与产品沟通，当数据量足够大时，每个分片数据近似相同，则各个分片计算出来的评分会很相近

2、查询的时候增加查询条件（dfs_query_then_fetch），不让各个分片单独计算得分，而是统一计算，这样会有一定的性能影响，官方文档也不建议这么做https://www.elastic.co/guide/en/elasticsearch/guide/2.x/relevance-is-broken.html

searchRequest.searchType("dfs_query_then_fetch");

PUT /test2
{
 "settings": {
   "number_of_shards": 5,
   "number_of_replicas": 1
 }, 
  "mappings": {
    "test2": {
      "dynamic_templates": [
        {
          "notanalyzed": {
            "match": "*",
            "match_mapping_type": "string",
            "mapping": {
              "type": "text",
                "analyzer": "ik_max_word",
              "search_analyzer": "ik_smart"
            }
          }
        }
      ]
    }
  }
}

POST /test2/_bulk
{"index":{"_index":"test2","_type":"test2","_id":"d483a79610b943f9892f479e1e4df8081"}}
{"mediaTag":"美国,英国,船"}
{"index":{"_index":"test2","_type":"test2","_id":"d483a79610b943f9892f479e1e4df8082"}}
{"mediaTag":"美国,英国"}
{"index":{"_index":"test2","_type":"test2","_id":"d0ce8c0651024ff5b1114ec263384a7c2"}}
{"mediaTag":"美国,英国,士大夫,船"}
{"index":{"_index":"test2","_type":"test2","_id":"d0ce8c0651024ff5b1114ec263384a7c1"}}
{"mediaTag":"美国,英国,士大夫"}
{"index":{"_index":"test2","_type":"test2","_id":"40fa46a395674f0fab4dcac45d0be2cd3"}}
{"mediaTag":"美国,船"}
{"index":{"_index":"test2","_type":"test2","_id":"25854d6cdd3b424e9ac43f0efd29afd04"}}
{"mediaTag":"英国,船,士大夫"}

GET /test2/_search?search_type=dfs_query_then_fetch
{
  "query": {
    "bool": {
      "must": [
        {"match": {
          "mediaTag": "英国,船"
        }}
      ]
    
    }
    
  }
}