技术文章汇总 第6页

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一、volatile关键字 volatile关键字的目的是告诉虚拟机： 1、每次访问变量时，总是获取主内存的最新值； 2、每次修改变量后，立刻回写到主内存。 volatile关键字解决的是可见性问题：当一个线程修改了某个共享变量的值，其他线...

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配置文件中添加配置 output { if [type]=="student" { elasticsearch { hosts => "10.130.225.49:9200" user => elastic password =...

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//节点统计值 API 可通过如下命令获取： GET /_nodes/stats | //分片状态查看 GET /_cat/shards?v //查看索引占用情况 GET _cat/segments?v&h=index,se...

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elasticsearch 7.6.2使用x-pack添加登录认证 第一步：切换到elasticsearch的bin目录下，使用下列命令生成证书 ./elasticsearch-certutil cert -out config/elast...

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public void ESClientInit() { public static RestHighLevelClient client = null; //不需要用户名和密码的认证 //client = new RestHighLeve...

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input { stdin{ } jdbc { # 连接的数据库地址和哪一个数据库，指定编码格式，禁用SSL协议，设定自动重连 jdbc_connection_string => "jdbc:mysql://127.0.0.1:330...

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1、准备工作：存在的mysql的数据库表、创建好的elasticsearch索引 2、下载mysql-connector 下载地址：https://dev.mysql.com/downloads/connector/j/ 选择 PlatFo...

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搭建过程 1、Elasticsearch集群搭建 2、Cerebro插件安装 tar -zxvf cerebro-0.9.1.tgz 解压cerebro压缩包 配置cerebro文件夹下 application.conf 配置集群的地址 ....

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JwtToken JWT token的格式：header.payload.signature 1、header的格式（算法、token的类型）： {"alg": "HS512","typ": "JWT"} 2、payload的格式（用户名、...

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public void ESClientInit() { public static RestHighLevelClient client = null; //不需要用户名和密码的认证 //client = new RestHighLeve...