集群健康檢查

取得健康狀態

GET /_cat/health?v

返回：

epoch timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent1535248805 10:00:05 elasticsearch yellow 1 1 1 1 0 0 1 0 - 50.0%

健康狀態分類

green：索引的primary shard和replica shard都是active狀態的

yellow：索引的primary shard都是active狀態的，但是部分replica shard不是active狀態，處于不可用的狀態、

red：不是所有索引的primary shard都是active狀態的，部分索引有數據丟失了

當前處于yellow狀態是因為目前只啟動了一個es進程，只有一個節點node，這是不安全的。這個節點的primary shard 有分配，但是replica shard 沒有節點分配，因此是yellow狀態。

快速查看集群有哪些節點

GET /_cat/indices?v

health status index uuid pri rep docs.count docs.deleted store.size pri.store.size

yellow open .kibana xSbUffi_SYGYIhPtiMxH5w1 1 1 0 3.1kb 3.1kb

簡單的索引操作

創建索引：PUT /test_index?pretty

返回：

{"acknowledged": true,"shards_acknowledged": true}

刪除索引：DELETE /test_index?pretty

返回：

{"acknowledged": true}

CURD 操作Demo

(1)新增商品：新增文檔，建立索引

PUT /ecommerce/product/1{"name" : "xi jie jing","desc" : "gaoxiao qing jie","price" : 30,"producer" : "xijiejing producer","tags": [ "qingxi", "wuzhi"]

}

返回：

{"_index": "ecommerce","_type": "product","_id": "1","_version": 1,"result": "created","_shards": {"total": 2,"successful": 1,"failed": 0},"created": true}

新增

PUT /ecommerce/product/2{"name" : "niunai","desc" : "mengniu niunai","price" : 25,"producer" : "mengniuniunai producer","tags": [ "niunai"]

}

返回：

{"_index": "ecommerce","_type": "product","_id": "2","_version": 1,"result": "created","_shards": {"total": 2,"successful": 1,"failed": 0},"created": true}

(2)查詢商品：檢索文檔

GET /ecommerce/product/1

返回：

{"_index": "ecommerce","_type": "product","_id": "1","_version": 1,"found": true,"_source": {"name": "xi jie jing","desc": "gaoxiao qing jie","price": 30,"producer": "xijiejing producer","tags": ["qingxi","wuzhi"]

}

}

(3)修改商品：替換文檔

PUT /ecommerce/product/1{"name" : "jiaqiangban gaolujie yagao","desc" : "gaoxiao meibai","price" : 30,"producer" : "gaolujie producer","tags": [ "meibai", "fangzhu"]

}

返回：

{"_index": "ecommerce","_type": "product","_id": "1","_version": 2,"result": "updated","_shards": {"total": 2,"successful": 1,"failed": 0},"created": false}

(5)刪除商品：刪除文檔

DELETE /ecommerce/product/1

{"found": true,"_index": "ecommerce","_type": "product","_id": "1","_version": 3,"result": "deleted","_shards": {"total": 2,"successful": 1,"failed": 0}

}

多種搜索方式

1?query string search

GET /ecommerce/product/_search

{"took": 12,"timed_out": false,"_shards": {"total": 5,"successful": 5,"failed": 0},"hits": {"total": 1,"max_score": 1,"hits": [

{"_index": "ecommerce","_type": "product","_id": "2","_score": 1,"_source": {"name": "niunai","desc": "mengniu niunai","price": 25,"producer": "mengniuniunai producer","tags": ["niunai"]

}

}

]

}

}

字段說明：

took：耗時

timed_out：是否超時

_shards：數據拆成了5個分片

hits.total：查詢結果的數量，3個document

hits.max_score：匹配分數，越相關，就越匹配，分數也高

hits.hits：包含了匹配搜索的document的詳細數據

此方法只是臨時在命令行使用，例如crul，不適用于復雜查詢。

2?query DSL

可以用json語法查詢語法

查詢所有的商品：

GET /ecommerce/product/_search

{"query": { "match_all": {} }

}

按照價格排序：

GET /ecommerce/product/_search

{"query": {"match": {"name" : "yagao"}

},"sort": [

{"price": "desc"}

]

}

總結

以上是生活随笔為你收集整理的elasticsearch java_java Elasticsearch详细介绍及使用实例分析的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。