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UAUptime Architectuptimearchitect.hashnode.devJun 23 · 10 min read

Data Guard Switchover vs Failover: Which Role Transition, and When

The two words get used interchangeably in incident bridges, and that confusion costs people data. A switchover and a failover both end with your standby running as the primary — but they are not the s

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RKRakesh Kishoretunedinstance.comJun 8 · 6 min read

Diagnosing SQL Server Always On Failovers: Error 1135 and VM Stuns

If you manage an enterprise-grade SQL Server Always On Availability Group (AG), few things are as frustrating as a sudden, unexpected failover in the middle of peak production hours. When you dig into

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STSamson Tanimawonovaaiops.hashnode.devApr 29 · 4 min read

Multi-Region Failover: Lessons from Running It Hot

Why "Hot" Matters Three multi-region strategies: Cold: Backup region is off. You start it when primary fails. RTO: hours. Warm: Backup region runs on minimum capacity. Scale up on failover. RTO: 15-30 minutes. Hot: Both regions serve live traffic sim...

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STSamson Tanimawonovaaiops.hashnode.devApr 29 · 4 min read

Multi-Region Failover: Lessons from Running It Hot

Why "Hot" Matters Three multi-region strategies: Cold: Backup region is off. You start it when primary fails. RTO: hours. Warm: Backup region runs on minimum capacity. Scale up on failover. RTO: 15-30 minutes. Hot: Both regions serve live traffic sim...

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BBGyaniblog.bgyani.co.inApr 26 · 4 min read

Failover & High Availability Explained

1. Problem Statement Imagine this: Your application is running fine.Traffic is flowing. Everything looks healthy. Suddenly, one backend server crashes. What happens next? Some users start seeing erro

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AGAnjali Garglearnera.hashnode.devMar 13 · 4 min read

What Happens When an AWS Region Goes Down?

Introduction When building applications on AWS, many developers deploy their backend in a single region. It works perfectly most of the time, but what happens if that region becomes unavailable? AWS o

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VPVishukumar Pateldevopsbyvishu.hashnode.devFeb 10 · 13 min read

Mastering AWS Route 53: A DevOps Guide to DNS and Traffic Management

Introduction It’s midnight. Your application database in the us-east-1 region just failed. You have a standby in the us-west-2 region, but your DNS points to the failed region. What happens next: Manual DNS update approach: Wake up, realize database...

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RGRyan Giggsryan-giggs.hashnode.devNov 10, 2025 · 16 min read

MySQL HeatWave: Identifying and Testing Failover in High Availability DB Systems

In a high availability MySQL HeatWave DB system, automatic failover is a critical mechanism that ensures business continuity when the primary instance becomes unavailable. Understanding how to identify when a failover has occurred and how to properly...

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BBalajibalajidevops.hashnode.devNov 6, 2025 · 5 min read

🛡️ Achieve High Availability: A Deep Dive into AWS Route 53 DNS Failover

In today's digital landscape, uptime is non-negotiable. A sudden outage can lead to lost revenue, frustrated customers, and damage to your brand reputation. This is where AWS Route 53 DNS Failover becomes your critical defense mechanism, ensuring yo...

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VKvishal kambletechflowinsights.hashnode.devOct 1, 2025 · 3 min read

Automating EC2 Failover with AWS Lambda and ALB Target Groups

High availability is a must for modern applications. But what happens if your primary EC2 instance fails? Do you want to manually update your Application Load Balancer (ALB) target groups every time? That’s where automation with AWS Lambda comes in. ...

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#failover

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Trending tags this week

Data Guard Switchover vs Failover: Which Role Transition, and When

Diagnosing SQL Server Always On Failovers: Error 1135 and VM Stuns

Multi-Region Failover: Lessons from Running It Hot

Multi-Region Failover: Lessons from Running It Hot

Failover & High Availability Explained

What Happens When an AWS Region Goes Down?

Mastering AWS Route 53: A DevOps Guide to DNS and Traffic Management

MySQL HeatWave: Identifying and Testing Failover in High Availability DB Systems

🛡️ Achieve High Availability: A Deep Dive into AWS Route 53 DNS Failover

Automating EC2 Failover with AWS Lambda and ALB Target Groups