elasticsearch - ES索引的最大字段数是多少

Question

您知道 flex 索引的最大字段数吗？
就我而言，我有200多种流利的配置

format csv
 keys Time,ID,Name,ip,val_1,val_2........,...,.,.,.,.,.,.,.,.,.,.,val_200

但在 flex 指数中，我只能看到字段( 45 )。字段数是否有限制？
还使用动态映射。

"mappings" : {
    "_default_" : {
      "_all" : {"enabled" : true, "omit_norms" : true},
      "dynamic_templates" : [ {
        "ID" : {
          "match" : "ID",
          "mapping" : {
            "type" : "string", "index" : "not_analyzed"
          }
        }
      },
      {
        "Name" : {
          "match" : "Name",
          "mapping" : {
            "type" : "string", "index" : "not_analyzed"
          }
        }
      },
      {
        "ip" : {
          "match" : "ip",
          "mapping" : {
            "type" : "ip", "index" : "not_analyzed"
          }
        }
      },
      {
        "string_fields" : {
          "match" : "*",
          "mapping" : {
            "type" : "float", "index" : "not_analyzed"
          }
        }
      }],
      "properties" : {
        "@timestamp" : { "type" : "date" }
          }
        }
      }

    }
  }
}

Answer 1

由于string_fields动态映射部分，您的某些值可能会被拒绝。它试图映射所有未以float列出的字段，因此任何非数字的字段都会被拒绝。此映射可能更适合

{
    "_default_": {
        "_all": {
            "enabled": true,
            "omit_norms": true
        },
        "properties": {
            "ID": {
                "type": "string",
                "index": "not_analyzed"
            },
            "Name": {
                "type": "string",
                "index": "not_analyzed"
            },
            "ip": {
                "type": "string",
                "index": "not_analyzed"
            },
            "@timestamp": {
                "type": "date"
            }
        },
        "dynamic_templates": [{
            "other_string": {
                "match_mapping_type": "string",
                "mapping": {
                    "type": "string",
                    "index": "not_analyzed"
                }
            }
        }]
    }
}

区别在于，您将静态匹配的字段移回属性，并且将动态模板更改为仅匹配看似字符串的字段，然后应用 "index": "not_analyzed"修饰符。您的原始映射尝试将其用于浮点类型，但是 float值始终存储而不进行分析。