查看索引GET_cat/indices?v&pretty查看映射GETtest/_mappings根据ID删除文档DELETEtest/_doc/RzrGCoYBybaXcbzwDnJf创建映射PUTtest/_mapping{"properties":{"customerJson":{"type":"object"},"operationMode":{"type":"integer"},"age":{"type":"long"},"birthday":{"type":"date","format"":"yyyy-MM-ddHH:mm:ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd"},"名称":{"类型"：“文本”}，“朋友”：{“类型”：“嵌套”，“属性”：{“修改时间”：{“格式”：“yyyy-MM-ddHH：mm：ss||yyyy-MM-dd||yyyy/MM/ddHH:mm:ss||yyyy/MM/dd","type":"date"}}}}}设置字段个数PUTtest/_settings{"index.mapping.total_fields.limit":3}设置嵌套结构对象个数PUTtest/_settings{"index.mapping.nested_objects.limit":2000}设置副本数PUTtest/_settings{"index":{"number_of_replicas":0}}设置映射模式1，true为默认值，自动addnewfieldstothemapping2,false,不在mapping中添加新字段，但是可以在doc中保存新字段3,“strict”不允许出现新字段时，会报错。嵌套结构支持单独配置PUTtest/_mapping{"dynamic":false}设置索引的refresh_interval为1分钟1.数据加入索引后，不能立即查询，需要等到index被刷新2.刷新间隔由refresh_interval配置，refresh_interval默认值为1s。3、单位：ms:毫秒s:秒m:分PUTmy_index/_settings{"index":{"refresh_interval":"1m"}}删除索引DELETEtestaddaliasPUTtest/_aliases{"actions":[{"add":{"index":"test","alias":"mytest"}}]}RemovealiasPUTtest/_aliases{"actions":[{"remove":{"index":"test","alias":"mytest"}}]}迁移数据POST/_reindex{"source":{"index":"indexName"},"dest":{"index":"newIndexName"}}查询所有`GETscrm_customer/_search`{"query":{"match_all":{}}}totalqueryGETtest/_search{"track_total_hits":true}totalqueryGETscrm_customer/_countmaximumqueryGETtest/_search{"size":0,"aggs“：{“最大你serId":{"max":{"field":"userId"}}}}去重查询，总数和必填字段GETtest/_search{"explain":true,"from":0,"size":10、"timeout":"60s","query":{"bool":{"must":[{"term":{"userId":{"value":100024,"boost":1}}}],"adjust_pure_negative":true,"boost":1}},"_source":{"includes":["userId"],"excludes":[]},"aggregations":{"DISTINCT_TOTAL_COUNT":{"基数”：{"field":"userId"}}},"collapse":{"field":"userId"}}FAQ1."type":"exception","re??ason":"Elasticsearchexception[type=mapper_parsing_exception,reason=嵌套文档的数量已超过允许的限制[10000]。可以通过更改[index.mapping.nested_objects.limit]索引级别设置来设置此限制。]2、验证失败：1：此操作将添加[9]totalshards，但是这个集群目前有[2997]/[3000]maximumshardsopen;],data=null)3,"type":"illegal_argument_exception","reason":"Limitogtotalfields[1000]hasBeenexceeded"限制1、对象和嵌套类型字段，也会创建属性，会占用字段数，每个索引建议不超过1000个属性2、创建索引不能超过10003，规范容量评估规范容量评估4、ES性能优化性能优化应用一、Elasticsearch在SCRM中的应用与优化
