标签:rdf epo 操作 set intern inter ali cond rop
该系列上一篇文章《Elasticsearch必知必会的干货知识一:ES索引文档的CRUD》 讲了如何进行index的增删改查,本篇则侧重讲解说明如何对index进行创建、更改、迁移、查询配置信息等。
仅创建索引:PUT index
PUT /index
添加字段设置(mappings):PUT index/_mapping/type,如:(properties下均为索引字段)
PUT /index/_mapping/_doc
{
"properties": {
"email": {
"type": "keyword"
}
}
}
添加索引设置(settings):PUT /index/_settings,如:
PUT /index/_settings
{
"number_of_shards":"8",
"max_inner_result_window":"130000",
"max_result_window":"130000",
"analysis":{
"analyzer":{
"ngram_analyzer":{
"tokenizer":"ngram_tokenizer"
}
},
"tokenizer":{
"ngram_tokenizer":{
"token_chars":[
"letter",
"digit",
"punctuation"
],
"type":"ngram",
"max_gram":"1"
}
}
}
}
添加别名或删除别名:POST /_aliases 或 PUT /index/_alias/name ,如:(remove表示删除别名,add表示添加别名)
POST /_aliases
{
"actions" : [
{ "remove" : { "index" : "test1", "alias" : "alias1" } },
{ "add" : { "index" : "test2", "alias" : "alias1" } }
]
}
PUT /index/_alias/name exp:/index/_alias/index100
一次性创建包含完整的别名(alias)、字段(mappings)、设置(settings)的索引,如:
PUT /index_name
{
"index_name":{
"aliases":{
"index_alias_name":{
}
},
"mappings":{
"index_type":{
"dynamic":"false",
"properties":{
"doubleField1":{
"type":"double",
"null_value":0
},
"keywordField2":{
"type":"keyword",
"null_value":""
},
"longField3":{
"type":"long",
"null_value":0
},
"textField4":{
"type":"text",
"fields":{
"raw":{
"type":"keyword",
"null_value":""
}
},
"analyzer":"ngram_analyzer"
},
"dateField5":{
"type":"date",
"null_value":"-62167420800000",
"format":"yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
}
}
}
},
"settings":{
"number_of_shards":"3",
"number_of_replicas":"2",
"max_inner_result_window":"130000",
"max_result_window":"130000",
"analysis":{
"analyzer":{
"ngram_analyzer":{
"tokenizer":"ngram_tokenizer"
}
},
"tokenizer":{
"ngram_tokenizer":{
"token_chars":[
"letter",
"digit",
"punctuation"
],
"type":"ngram",
"max_gram":"1"
}
}
}
}
}
}
index自动滚动【Rollover】,即:当索引达到预设的滚动条件时,会自动创建新的索引(index),并将别名(alias)指向最新的索引,原索引将被自动删除映射,如:(先创建索引并指名索引别名,然后执行_rollover API 且设定滚动的条件值,最后正常的插入文档数,当达到滚动条件后,则会自动触发index _rollover)
POST index_alias_name/_rollover/
{
"conditions": {
"max_age": "7d", //设置:最大时间7天
"max_docs": 10000,//设置:最大文档记录数
"max_size": "5gb" //设置:索引最大容量
}
}
//Response:
{
"old_index": "旧索引名",
"new_index": "新索引名",
"rolled_over": true,
"dry_run": false,
"acknowledged": true,
"shards_acknowledged": true,
"conditions": {
"[max_docs: 10000]": true,
"[max_age: 7d]": false,
"[max_size: 5gb]": false
}
}
//POST index_alias_name/_doc -d {index文档JSON} 插入10000以上的文档记录
重建索引(_reindex),即:一旦索引被创建,则无法直接修改索引字段的mapping属性,必需要重建索引然后将旧的索引数据迁移到新的索引中才行(迁移过程底层使用了scroll API ),如:
POST _reindex
{
"conflicts": "proceed",//发生冲突继续执行
"source": {
"index": "old_index",
"type": "_doc",
"size": 5000, //设置每批迁移的文档记录数
"_source": ["user", "_doc"], //可设置要迁移的索引字段,不设置则默认所有字段
"query": { //可设置要迁移的文档记录过滤条件
"match_all": { }
}
},
"dest": {
"index": "new_index",
"type": "_doc",
"version_type": "internal" //"internal"或者不设置,则Elasticsearch强制性的将文档转储到目标中,覆盖具有相同类型和ID的任何内容
}
}
其它说明可参见:ES数据库重建索引——Reindex(数据迁移)
查询index的完整定义信息:GET /index ,如:
GET /index
只查询mapping字段信息:GET /index/_mapping (带s也可以)
GET /index/_mapping OR /index/_mappings
OR /index/_mapping/_doc【如有多个type可以加上指定type】
只查询settings信息:GET /index/_settings
GET /index/_settings
Elasticsearch必知必会的干货知识二:ES索引操作技巧
标签:rdf epo 操作 set intern inter ali cond rop
原文地址:https://www.cnblogs.com/zuowj/p/13384701.html