Elasticsearch基本概念

待我称王封你为后i 2023-07-04 06:16 17阅读 0赞

**1、Index索引、Node节点**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70]  
开发关注数据的索引，运维关注的节点情况及物理情况

**2、文档（Document）**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 1]

**3、JSON文档**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 2]

**4、文档元数据**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 3]  
**5、索引**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 4]  
**6、Type**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 5]  
**7、关系型数据库与ElasticSearch 数据结构对比**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 6]  
**8、ElasticSearch 是怎么实现跨平台**  
ElasticSearch 支持REST API ,所有开发语言都可以调用  
![ElasticSearch  支持][ElasticSearch]  
**9、Index 相关 API**  
在如下api 命令需要在 Kibana Dev Tools 执行，相关KIbana安装配置及demo数据导入详见  
https://blog.csdn.net/qq\_36918149/article/details/104224625  
Dev Tools 中调用 Elasticsearch api  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5_size_16_color_FFFFFF_t_70 7]  
一些简单api用法

#查看索引相关信息
    GET kibana_sample_data_ecommerce
    
    #查看索引的文档总数
    GET kibana_sample_data_ecommerce/_count
    
    #_cat indices API
    #查看indices
    GET /_cat/indices/kibana*?v&s=index
    
    #查看状态为绿的索引
    GET /_cat/indices?v&health=green
    
    #按照文档个数排序
    GET /_cat/indices?v&s=docs.count:desc
    
    #查看具体的字段
    GET /_cat/indices/kibana*?pri&v&h=health,index,pri,rep,docs.count,mt
    
    #How much memory is used per index?
    GET /_cat/indices?v&h=i,tm&s=tm:desc

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[ElasticSearch]: https://img-blog.csdnimg.cn/20200208212557921.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM2OTE4MTQ5,size_16,color_FFFFFF,t_70
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