学习笔记：
https://www.yuque.com/gaohanghang/vx5cb2/aa576g#HuZ1N
- ES对比MySQL
| MySQL | ES |
|---|---|
| Database | Index |
| Table | Type |
| Row | Document |
| Column | Field |
| Schema | Mapping |
Mysql :
select * from user_.user_info where name = "张三"ES:
GET /user/user_info/_search?q=name:张三- 下载es
https://www.elastic.co/cn/downloads/past-releases/elasticsearch-6-3-1
下载zip包，解压
linux安装：
adduser es
passwd es
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.3.1.tar.gz
tar -zxvf elasticsearch-6.3.1.tar.gz
#修改conf目录下的elasticsearch.yml
#增加配置：
network.bind_host: 0.0.0.0
#切换到root用户
在 /etc/sysctl.conf文件最后添加一行
vm.max_map_count=262144
https://www.cnblogs.com/yidiandhappy/p/7714489.html
执行这个使得配置生效：
sysctl -p
常见的几种报错的解决方式：
https://www.jianshu.com/p/2285f1f8ec21
max number of threads [3818] for user [es] is too low, increase to at least [4096]
vim /etc/security/limits.conf
* soft nofile 65536
* hard nofile 65536
- 安装kibana:
wget https://artifacts.elastic.co/downloads/kibana/kibana-6.3.1-linux-x86_64.tar.gz
然后解压
然后修改
server.host: "0.0.0.0"
通过这个命令可以查询到kibana运行的pid：
ps -ef | grep node
- 安装logstash
wget https://artifacts.elastic.co/downloads/logstash/logstash-6.3.1.tar.gz
- IK分词器安装：
https://github.com/medcl/elasticsearch-analysis-ik
切换到es的plugins目录
新建一个文件夹叫做ik
然后将下载后的文件内容，复制到ik目录下即可
mkdir elasticsearch-6.3.1/plugins/ik
unzip elasticsearch-analysis-ik-6.3.1.zip elasticsearch-6.3.1/plugins/ik/
然后重启es
使用IK分词器： ik_smart ik_max_word
POST _analyze
{
"analyzer": "ik_smart",
"text": "今天天气真好啊"
}