There are some situations in Galera cluster that joiner node fails to start and in this article we want to show How to troubleshoot Galera cluster joiner node service. If you want to know how to setup Galera cluster, please refer to article Database replication with mariadb on CentOS 7 linux.
MongoDB is a NoSQL database engine with full flexible index support and rich queries and here we want to show how to install MongoDB on CentOS 7 linux. It is an opensource database engine that stores data as Key-Value in Json format. Some big companies including Adobe, Facebook, Google, eBay, and Coinbase use MongoDB in […]
In this tutorial, we are going to show you how to setup an active-active three-nodes database replication with mariadb on centos 7 linux.active-active database replication means that two servers exchange update information bidirectional. also arbitrator is a server that will refree between two masters when there is a problem between them about who has lastest […]