分布式搜索引擎ElasticSearch——深入elasticSearch

数据聚合

聚合的分类

DSL实现Bucket聚合

DSL实现Metric聚合

RestAPI实现聚合

自动补全

https://github.com/medcl/elasticsearch-analysis-pinyin

DSL实现自动补全查询

Completion Suggester

修改酒店索引库数据结构

RestAPI实现自动补全查询

实现酒店搜索页面输入框的自动补全

数据同步

数据同步思路分析

利用MQ实现mysql与elasticsearch数据同步

elasticsearch集群

搭建ES集群

部署es集群可以直接使用docker-compose来完成，不过要求你的Linux虚拟机至少有4G的内存空间

首先编写一个docker-compose文件，内容如下：

version: '2.2'
services:es01:image: docker.elastic.co/elasticsearch/elasticsearch:7.12.1container_name: es01environment:- node.name=es01- cluster.name=es-docker-cluster- discovery.seed_hosts=es02,es03- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock:soft: -1hard: -1volumes:- data01:/usr/share/elasticsearch/dataports:- 9200:9200networks:- elastices02:image: docker.elastic.co/elasticsearch/elasticsearch:7.12.1container_name: es02environment:- node.name=es02- cluster.name=es-docker-cluster- discovery.seed_hosts=es01,es03- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock:soft: -1hard: -1volumes:- data02:/usr/share/elasticsearch/datanetworks:- elastices03:image: docker.elastic.co/elasticsearch/elasticsearch:7.12.1container_name: es03environment:- node.name=es03- cluster.name=es-docker-cluster- discovery.seed_hosts=es01,es02- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock:soft: -1hard: -1volumes:- data03:/usr/share/elasticsearch/datanetworks:- elasticvolumes:data01:driver: localdata02:driver: localdata03:driver: localnetworks:elastic:driver: bridge

Run docker-compose to bring up the cluster:

docker-compose up

ES集群的脑裂

### ES集群的分布式存储

ES集群的分布式查询

### ES集群的故障转移