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Package Installation Add the Elastic PGP key and set up the repository: sudo rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch sudo tee /etc/yum.repos.d/logstash.repo <<EOF [logstash-8.x] name=Elastic repository for 8.x packages baseurl=https://artifacts.elastic.co/packages/8.x/yum gpgcheck=1 gpgkey=https://artifacts.elasti ...

Introduction to Logback Configuration and Architecture Logback stands as a high-performance, flexible, and extensible logging framework for Java applications, designed by Ceki Gülcü, the creator of log4j. As an implementation of SLF4J (Simple Logging Facade for Java), it serves as a successor and improvement over log4j, offering enhanced speed, ...

Interface Settings Appearance & Behavior Theme Configuration Adjusting Font and Size for Windows and Menus You can install your preferred font and select it here. Enable Memory Indicator Display IDEA does not show memory usage by default. To enable it, go to Help - Find Actions, search for Show memory indicator, and set it to On: Result: Di ...

Spring Boot Overview Spring Boot is a framework designed to simplify the development of Spring-based applications. It integrates the entire Spring ecosystem and provides a comprehensive solution for enterprise-level J2EE development. Microservices Architecture Introduced around 2014 by Martin Fowler, microservices represent an architectural sty ...

PostgreSQL configuration parameters control database behavior and performance. These settings are categorized based on how changes take effect. Parameter Context Types Context Description internal Read-only parameters compiled into the server or set during initialization. postmaster Requires a server restart to apply changes. sighup ...

Redis Overview Redis is a high-performance, open-source key-value database that operates entirely in-memory. Unlike traditional relational databases, Redis stores data as key-value pairs with support for various data structures, making it exceptionally versatile for caching, session management, real-time analytics, and message queue implementat ...

Installation Methods Elasticsearch can be installed using several methods. This guide covers tarball, RPM, and Docker approaches. 1.1 Tarball Installation Create a setup script to automate the installation process. #!/bin/bash # setup_es.sh ES_INSTALL_DIR="/opt/elasticsearch" ES_VERSION="7.9.2" # Create installation dire ...

Remove existing MySQL/MariaDB packages MySQL is no longer included in the CentOS 7 repository, and has been replaced by MariaDB. 1. Use rpm -qa | grep mariadb to find existing MariaDB packages: If present, use rpm -e --nodeps mariadb-* to remove them: [root@localhost ~]# rpm -qa | grep mariadb mariadb-server-5.5.52-1.el7.x86_64 mariadb-libs-5.5 ...

The announcement of the Windows Mail app's deprecation has led to the automatic launch of the newer Outlook (new) application on many Windows 11/10 systems. For users who prefer the full-featured Outlook desktop client (Outlook (classic)), several methods exist to restore its default behavior. Key Differences Between Outlook Versions Outlook ( ...

Redis implements a transaction mechanism enabling atomic execution of command groups, ensuring all commands succeed or none execute, thus maintaining data consistency. The following commands and methods are central to Redis transactions. Initiating Transactions MULTI Starts a transaction, marking its beginning. Queueing Commands command Comm ...