Elasticsearch入门

Elasticsearch简介

分布式的、Restful风格的搜索引擎
支持对各种类型的数据的检索：结构化、非结构化的数据均可
搜索速度快，可以提供实时的搜索服务：可以提供实时的搜索服务
便于水平扩展，每秒可以处理PB级海量数据：集群式部署，可以加服务器

Elasticsearch术语

索引、类型、文档、字段
集群、节点、分片、副本

下载Es

将Es加入到zshrc中

中文分词插件

下载elasticsearch-analysis-ik，解压到Elasticsearch的plungin目录下即可

下载postman

使用命令行操作Es

> curl -X GET "localhost:9200/_cat/health?v"          // 查看健康状态
epoch      timestamp cluster  status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1688629719 07:48:39  nowcoder green           1         1      1   1    0    0        0             0                  -                100.0%

> curl -X GET "localhost:9200/_cat/nodes?v"         // 查看当前节点
ip        heap.percent ram.percent cpu load_1m load_5m load_15m node.role   master name
127.0.0.1           36         100  27    5.74                  cdfhilmrstw *      HuaWei-MateBook-14.local

> curl -X GET "localhost:9200/_cat/indices?v"      // 查看当前索引
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size

> curl -X PUT "localhost:9200/test"                       // 新建索引
{"acknowledged":true,"shards_acknowledged":true,"index":"test"}%

> curl -X GET "localhost:9200/_cat/indices?v"      // 查看索引
health status index uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow open   test  0cjMJAOMQ96GmE749eNs1A   1   1          0            0       247b           247b

> curl -X DELETE "localhost:9200/test"               // 删除索引
{"acknowledged":true}%

> curl -X GET "localhost:9200/_cat/indices?v"   
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size