Programmer Think

1: Check whether mysql has been installed locally rpm -qa | grep mysql 2: Uninstall previous mysql rpm -e Existing MySQL full name Step 2: unzip the file [root@MiWiFi-R3-srv ~]# tar -zxvf mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz -C /usr/local/ Change the file name to mysql: [root@MiWiFi-R3-srv local]# mv mysql-5.7.17-linux-glibc2.5-x86_ ...

For single process implementation @RequestMapping("/miaosha1") @ResponseBody public String miaosha1() { synchronized (this){ Map<String,Object> mapListmaps = new HashMap<>(); //Get inventory value in redis int kucun = Integer.valueOf(redisUtil.getStrKV("kucun").toString()) ...

Using docker-compose to build mysql master-slave structure A few days ago, I tried to learn the online tutorial. Using docker-compose, I set up a simple master-slave mysql for learning purposes. Next, I will show you the pure dry goods step by step in the following section. Roll up!!! First, the basic environment and software used by the auth ...

Database Introduction concept A Database for storing data, which organizes, stores and manages data according to a certain data structure. classification Relational databases: mysql, sql server, oracle, DB2, etc. Non-relational databases: redis, etc. How python operates on databases pymysql: pure Python development, supporting python2 and ...

Introduction: MySQL is a relational database management system, which is often used to build websites such as LAMP and LNMP. This book will introduce you how to install, configure and remotely access MySQL database on ECS instance of Linux system. For image download, domain name resolution and time synchronization, please click Alibaba open ...

MySQL MHA high availability cluster deployment and failover MySQL MHA 1, MHA concept MHA (MasterHigh Availability) is a set of excellent software for failover and master-slave replication in MySQL high availability environment. The emergence of MHA is to solve the problem of MySQL single point. During MySQL failover, MHA can automatically co ...

1. Background Do you have such trouble? When there is a problem in the online MySQL Cluster, you need to test some in the test environment However, when building a single machine cluster, especially a test cluster or MGR cluster, the environment needs to be built It takes a lot of time and then needs to be recycled. Moreover, the number of mac ...

brief introduction To add data in batch in PB table, you can specify the insertion method. Batch insertion interface is a non atomic interface, which allows partial success and partial failure. The user needs to judge the number of successful records or failed records according to the return value. POST http://{Tcaplus_REST_URL} Request syn ...

For cluster configuration, see: WSO2 ESB 5.0.0 cluster configuration 1, Cluster database Each Carbon based product uses a database to store user management details and registry data. All nodes in the cluster must use a central database for configuration and governance registry mount. H2 is not recommended for production.It is not recomme ...

1, Bin log backup function The operation log of mysql binary database is the safe log of transaction. 2, Open bin log Set the profile my inf Add the following content to the configuration file log-bin=/var/lib/mysql/mysql-bin //Open and set the backup file directory and backup naming format server-id=1 //The unique id of the database server ...