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mybatis cache: first-level cache and second-level cache hibernate caching: first-level caching and second-level caching With regard to caching: Caching is between physical data sources and applications. It copies data in a database and temporarily stores it in memory. Its purpose is to reduce the number of times the application accesses physica ...

Installation of gitlab Configuration of gitlab Viewing version number of 1 gitlab ssh port modification of 2 gitlab 21 Open the configuration file 22 Use commands to rebuild configurations 3 https 31 Upload certificates or use specific creations created by yourself to see another article of mine nginx witho ...

Most of the reference blogs are based on Hadoop 2.x and low-level java. The configuration process seems very simple to write. Looking at other people's blogs, it feels the same steps. But there are many problems when configuring the blog: data node can't start, the page can't display properly, data node inexplicably dies, resourcemanager can't ...

This article describes how to use HttPie for related operations. Introduction to the Use of Httpie Web Api Rundeck provides a better exposed WebApi for easier integration without cli. curl, for example, is basically the standard of all linux. In addition, Api and rundeck APIs can also be used directly in programs. See bel ...

Hadoop installation steps hadoop Download address: http://mirrors.advancedhosters.com/apache/hadoop/common/   1. Install JDK and hadoop (jdk requires version 1.7 or more) The user installing hadoop is root Create installation directory and unzip related files: mkdir /usr/local/java mkdir /usr/local/hadoop mkdir /usr/loc ...

In the previous chapter, the blogger introduced the architecture of the mainalived + nginx (backup) high-availability system for large-scale Internet projects. I believe you should read the blogger's article and have a certain understanding of the mainalived / nginx technology. In this section, the blogger will share the related technology and ...

File and content processing - head, tail 1. head: Display the file content header Functional description of head command The head command is used to display the contents of the file header. By default, executing the head command will output 10 lines at the beginning of the file. The grammatical format of the head command head [OPTION]... [ ...

Ansible + Reclass.png Hello, everyone. My name is Xie Wei. I'm a programmer. Theme of this section: Ansible + Reclass If you've been following me continuously, you should know that my job is to install and deploy the PaaS platform and to deploy components on multiple nodes, I'll use Ansible. If you want to know the basics of ...

. tar Packing multiple files together and decompressing the packaged files - z # Compression or decompression via gzip - c # Create a new jar package - v # Displays the tar command execution process - f # Specify the file compression name - t View the contents of the compressed package without decompressing it __________ - p # Keep the ...

Following is a step-by-step tutorial on learning docker Common commands: Delete all containers docker rm `docker ps -a -q` View all containers docker container ls --all Stop a single container docker container stop container id Remove all mirrors docker rmi `docker images -q` Remove a single image docker rmi mirror id ...