high availability

Master-Slave Replication in MySQL: A Step-by-Step Guide

MySQL /

Introduction MySQL master‑slave replication remains a foundational technology for database scaling, high availability, and disaster recovery. As a Senior Database Administrator, I routinely design and maintain replication topologies that support mission‑critical workloads. In this post we dive into the practical steps required to set up a reliable master‑slave pair, address common pitfalls, and outline best […]

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Setting Up PostgreSQL Streaming Replication for HA

PostgreSQL /

Introduction Streaming replication is the cornerstone of modern PostgreSQL high‑availability solutions. Unlike file‑based WAL shipping, streaming sends WAL records over a TCP socket in real time, allowing a standby to stay close to the primary’s state. This post walks through every step you need to set up streaming replication, from basic configuration to advanced fail‑over

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SQL Server Always On Setup Guide

SQL Server /

Why Choose Always On Availability Groups? Always On Availability Groups (AG) are Microsoft’s native high‑availability and disaster‑recovery (HADR) solution for SQL Server. They provide: Automatic failover with synchronous‑commit replicas. Read‑only routing for reporting workloads. Granular failover at the database level, not the instance level. Support for up to eight secondary replicas (SQL Server 2019+). For

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Optimizing SQL Server 2019 Recovery with ADR Preallocation

SQL Server /

Optimizing Recovery Performance in SQL Server 2019 SQL Server 2019 has brought numerous features to improve its performance and disaster recovery capabilities. One such feature, the Automatic Seeding and Reseeding mechanism in Always On Availability Groups, relies heavily on the automatic database recovery process. However, this automated recovery mechanism requires a substantial amount of time

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How to Restore a Standby Database Using RMAN Backup in Oracle 12cR2

Oracle /

Maintaining a synchronized standby database is essential for disaster recovery and high availability in Oracle Database environments. A standby database acts as a replica of the primary database, ready to take over operations in case of failure, ensuring minimal downtime and data loss. In this comprehensive guide, we outline the key steps to restore a

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Step-by-Step Guide: Installing and Configuring Oracle RAC on Oracle 21c

Oracle /

In this comprehensive guide, we’ll walk you through the process of installing and configuring a two-node Oracle Real Application Clusters (RAC) environment using Oracle Database 21c on the latest version of Oracle Linux. We’ll cover everything from hardware requirements and kernel parameters to installing binaries and configuring Automatic Storage Management (ASM). Table of Contents Prerequisites

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How to Perform Online Table Partitioning in Oracle with Minimal Downtime

Oracle /

Efficiently managing large tables in Oracle Database is essential for maintaining optimal performance and ensuring smooth operations. One effective method to achieve this is through table partitioning. Traditional partitioning methods, however, often require significant downtime, which can disrupt business activities. In this guide, we’ll explore how to perform online table partitioning in Oracle with minimal

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Understanding Oracle Data Guard Architecture: Ensuring High Availability and Disaster Recovery

Oracle /

Oracle Data Guard is a powerful solution for achieving high availability, data protection, and disaster recovery in Oracle databases. In this article, we’ll delve into the architecture of Oracle Data Guard, with a focus on the relationship between primary and standby databases. By the end, you’ll understand how the components work together to maintain a

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