high-availability – ITFROMZERO

Configuring MySQL Active-Active Replication: Bidirectional Data Sync and Concurrent Write Conflict Handling

By admin July 2, 2026

A step-by-step guide to configuring MySQL Active-Active (Master-Master) Replication — from setting up binlog users and configuring auto_increment to prevent ID collisions, to handling write conflicts and practical routing tips from a 50GB production database.

Centos

HAProxy Layer 7 Load Balancer on CentOS Stream 9: Installation, Configuration, and Backend Health Checks

By admin June 30, 2026

A practical guide to installing HAProxy as a Layer 7 load balancer on CentOS Stream 9, covering SELinux boolean configuration, firewalld setup, backend health checks, and real-time monitoring via the Stats page. Includes a complete configuration example and a real-world failover test scenario.

VMware

Configuring vCenter Server High Availability (vCenter HA): Eliminating the Single Point of Failure in Your vSphere Environment

By admin June 20, 2026

A step-by-step guide to configuring vCenter Server High Availability (vCenter HA) on VCSA 8.0, covering the Active-Passive-Witness architecture, HA network configuration, failover testing, and practical operational tips from a production environment. Eliminate the single point of failure in your vSphere management layer with automatic failover in 4–8 minutes.

MySQL

MySQL Semi-synchronous Replication: Zero Data Loss Without Group Replication

By admin June 13, 2026

MySQL Semi-synchronous Replication ensures zero data loss for production databases by requiring at least one slave to acknowledge receipt of the binlog before the master commits. This article compares async, semi-sync, and Group Replication, analyzes when each is appropriate, and provides a step-by-step deployment guide from enabling the plugin to real-world monitoring.

Database

Deploying MariaDB Galera Cluster: A Multi-master High Availability Solution for Production

By admin May 16, 2026

A detailed guide on setting up a 3-node MariaDB Galera Cluster. This synchronous multi-master solution ensures your database system stays online and secure against hardware failures.

MySQL

MySQL Router: The ‘Gatekeeper’ Enabling Automatic Failover and Fault Tolerance for InnoDB Clusters

By admin May 4, 2026

Don't let your database become a single point of failure. This guide covers how to set up MySQL Router to automate routing and failover for production InnoDB Clusters.

Database

Deploying Patroni: The ‘Sleep Better’ Solution for PostgreSQL Administrators

By admin May 3, 2026

Database outages in the middle of the night are no longer a concern. A detailed guide on deploying Patroni to automate PostgreSQL Failover and ensure 24/7 availability.

Database

Deploying Redis Cluster: A Scalable Cache Solution for High-Load Systems

By admin May 1, 2026

Learn how to set up a Redis Cluster to break the limits of a single server. Detailed guide on Sharding, Hash Slots, and automatic Failover for high availability.

Database

Mastering CockroachDB: When a ‘Resilient’ SQL Database Helps You Sleep Better

By admin May 1, 2026

A 2 AM system crash is every developer's nightmare. Discover how to deploy CockroachDB—a distributed SQL database with self-healing capabilities for absolute uptime.

MySQL

MySQL GTID Replication Setup Guide: Advanced Data Synchronization and Automatic Failover

By admin April 27, 2026

A step-by-step guide to configuring MySQL GTID Replication on Ubuntu: set up Master and Slave, verify data synchronization, and handle automatic failover without manually tracking binlog positions.