Programmer Group

What is heterogeneous data processing? Simply put, in order to satisfy the expansion of our business, data is transformed from a specific format to a new data format. Why does this need arise? In traditional enterprises, data are mainly stored in relational databases, such as MySQL, but in order to meet the expansion of demand, the dimension ...

< font color = Red > No reprinting, no handling </font > Problems encountered: First, the browser can not open blog.jd.com: DNS has been configured, the ultimate reason: this graphical CentOS7 uses dncp to obtain ip, DNS also access the gateway; Solution: Fixed IP, set DNS manually, and confirm / etc/reslov.conf Two, NFS permissi ...

This paper uses Sharding-JDBC to realize read-write separation based on entOS 7 + MySQL 5.7 I. MySQL Installation and Configuration 1.1 installation Execute orders in turn: sudo wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm sudo yum -y install mysql57-community-release-el7-10.noarch.rpm sudo yum ...

How Kubernetes manages storage resources. First we will learn about Volume and how Kubernetes provides storage for containers in clusters through Volume; then we will practice several commonly used Volume types and understand their respective application scenarios; finally, we will discuss how Kubernetes separates cluster administrators from c ...

Preface For the application scenario of "nearby people" in the field of location-based services, many spatial indexes such as PG, MySQL and Mongo DB can be used to implement it. Redis, which combines its ordered queue zset and geohash coding, achieves the function of spatial search and has a very high operational efficiency. This pap ...

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MinBox Logging MinBox Logging is a distributed, zero-intrusion link log analysis framework, which supports configuration and use under Spring Cloud micro-service architecture. It encapsulates RestTemplate and OpenFeign to transmit link information. Zero invasive MinBox Logging does not need to use annotation configuration to collect link logs, ...

Following up the following article: Backup database for introduction to MySQL database Installation environment instructions System environment: [root@~]# cat /etc/redhat-release CentOS release 6.5 (Final) [root@~]# uname -r 2.6.32-431.el6.x86_64 Database: Because it is a simulated environment, the master and slave libraries are on the same se ...

In previous blogs in this series, we have never explained how to operate databases, but in practical work, almost all systems are inseparable from data persistence, so it is very important to master how to operate databases. There are many ways to operate databases in Spring. We can use JDBC, Hibernate, MyBatis or other data persistence framewo ...

Realm Profile: Again, data domains, Shiro, and connectors for secure data are like jdbc connecting to databases; getting information about authentication and authorization through realm realm effect: Shiro retrieves security data from Realm The default home realm: idae looks at realm inheritance relationships with default implementations a ...