#high-availability

Oracle Data Guard Explained

Why Data Guard  ?

CKA-39-Kubernetes Pod Disruption Budgets

Protect availability during voluntary disruptions with Kubernetes PodDisruptionBudgets and safe rollout settings.

Multi-Region Architecture Active-Active , Active-Passive & Geo-Distribution

At some point, one data center stops being enough. Maybe your users are now global and a round trip to a single US region is adding real…

The Hidden Cost of Phone Downtime, and How Businesses Are Solving It

Most businesses do not think about their phone system until it stops working. Then, suddenly, it is the only thing anyone can think about.

Measuring Availability Properly: Percentiles, Tail Latency, and the Production Traps

Observability is a key part of any infrastructure but I’ve watched teams repeat the same mistakes around measuring availability. For…

PCS Zero to Hero — Part 4: Managing Cluster Resources, Virtual IP (VIP) & Automatic Failover

In the previous article, we successfully created a two-node High Availability Cluster using PCS, Pacemaker, and Corosync on AlmaLinux 9.8…

CAP Theorem: The Core Trade‑off in Distributed Systems

Whenever you design a distributed data store, CAP is the reality check that forces you to make explicit trade‑offs.

PCS Zero to Hero — Part 3: Creating Your First High Availability Cluster on AlmaLinux 9.8

In the previous article, we prepared two AlmaLinux 9.8 nodes by configuring networking, hostname resolution, time synchronization, the…

InfoScale 9.2 is now Generally Available

New Capabilities. Broader platform support. Stronger Security. Smarter operations.

Scaling Redis at Trendyol: The Evolution from Sentinel to Native Cluster Architecture

Introduction

Conventional Disaster Recovery Is Not Enough Anymore

Why traditional DR strategies fail modern systems — and what to do instead

The Quiet Burnout of Being Everyone’s Emotional Support System

Some people don’t realize they’ve become the person everyone vents to… until they stop replying the same way

Dedicated Server Load Balancing and High Availability Setup

Modern businesses rely heavily on online applications, websites, cloud platforms, and digital services. Whether it is an eCommerce store…

Keepalived, HAProxy, and the Firewall That Ate My VRRP Packets

High-Availability Gone Split-Brain: A Production Debugging Story

Designing for failure in AWS: EKS + serverless resilience in practice

On a recent workload, we rebuilt a critical service using AWS EKS for core processing and serverless (Lambda + EventBridge) for buffering…

Database Replication Explained: How Modern Applications Scale to Millions of Users

When you post a photo on Instagram, send a message on WhatsApp, or place an order on Amazon, you expect the application to work instantly…

如何在 Proxmox VE 雙節點叢集搭配 QDevice 作為額外的仲裁節點

在預設情況下，Proxmox VE 叢集中的每個節點都擁有一張投票權，且叢集中的操作必須取得超過半數的票數 (Quorum)…

如何建立 Proxmox VE 叢集 Cluster

當虛擬化環境逐漸擴大、主機數量持續增加時，若每台 Proxmox VE 主機都必須個別管理，將會提高維運成本與管理難度，也會限制後續的擴充能力與高可用性架構的建置。

Multi Cloud, a buzzword?

A few years into working in cloud architecture, I realized something important: multi-cloud sounds impressive, but it’s not always the…

Building Fault-Tolerant Architectures in Multi-AZ and Multi-Region Environments

Why Modern Systems Must Be Designed to Fail

Airgapped Linux Ortamında Postgresql HA Cluster Kurulumu 4–4_Diğer nodeler kurulum ve apt deposu…

Apache sunucumuz kuruldu artık diğer sunucularımızı kurmaya geçebiliriz. Öncelikle pg1 nodumuzu kuracağız. Yeni 3 ayrı disk oluşturup…

How to Set Up MariaDB Active-Standby Replication on Bare Metal or VM

A practical guide for configuring MariaDB primary-slave replication for read scaling and standby readiness

Avoiding Single Points of Failure (SPOF) in Distributed Systems

A Single Point of Failure is any component whose failure brings down the entire system. The goal is redundancy at every layer.

Engineering a Resilient Tier III ↔ Tier IV DC-DC Backbone Using Dark Fiber and DWDM Transport

Building a National-Scale Government Data Center Interconnect with High Availability, Optical Diversity, and Operational Resiliency

High Availability-PCS Cluster Setup & Configuration

In this blog, we will configure a high availability (HA) cluster using iSCSI service and targetcli for an e-commerce website. The setup…

How to Enable CredCheck on PostgreSQL Active-Standby Setup

A practical guide for installing and enabling CredCheck safely in a PostgreSQL 17 streaming replication environment

Availability & Reliability: The Backbone of System

Most systems don’t fail loudly. They fail silently — Just a few timeouts, slight delayed response, one “try again later” .

Scaling PostgreSQL for Multi-Campus Digital Operations with Pgpool-II and Streaming Replication

As our digital operations expanded across multiple campuses, our database infrastructure became the heart of almost everything we run —…

Elastic IP failover with Keepalived: how we keep self-managed loadbalancers redundant

Active-passive high availability at the public edge on AWS: Elastic IP, Keepalived, VRRP, and EC2 API moves.

MySQL Master-Master Replication Recovery Explained

While learning MySQL replication, one common question appears:

Availability

Accessibility Despite Downtime

Maximize Uptime And Improve TCO: RAS And Telemetry In HBM4 For Data Centers

As AI workloads scale and data center operations become increasingly complex, it is critical to keep the infrastructure up and running…

Arcfra AECP 6.3 Deep Dive | RDMA Cross-NIC HA for High-Performance Workload Reliability

Breaking RDMA HA Limits with Cross-NIC Bonding for Mission-Critical High-Performance Workloads

Kubernetes Leader Election Across Multiple Clusters

Kubelet Explained: The Agent That Brings Your Pods to Life

How DNS works — from basics to RoundRobin balancing, GeoDNS, LatencyDNS

Many have heard of a Load Balancer (balancing the load between application instances). But has anyone wondered: who balances the balancer?

Arcfra AECP 6.3 Tech Insights: Why RDMA Needs Cross-NIC HA?

Explore RDMA HA limits and how AECP 6.3 delivers NIC-level resilience through cross-NIC bonding for critical workloads.

What Does One Hour of Downtime Cost Your Business?

Demystifying RTO and RPO: How to Choose the Right Disaster Discovery Strategy.

How I Declustered My Proxmox Setup Without Data Loss

In my previous article, I walked through building a Proxmox cluster using two main nodes (a Dell Optiplex and a MeLE Fanless N100) and a…

Scaling Banking APIs: Architecture Strategies for 10,000 TPS

Scaling banking APIs to 10k TPS? Stop adding servers and start shifting your architecture. Discover the secrets to real agility.

Haute Disponibilité & Reprise après Sinistre (HADR) : Entre Réflexion Stratégique et Rigueur…

Il n’existe pas de solution universelle. Il existe une solution adaptée à votre contexte, et c’est précisément là que commence le vrai…

Raft — consensus algorithm for fault-tolerant systems

Raft — consensus algorithm for fault-tolerant systems.

Want to help InfoScale start the future? Join the Luminos Beta

The InfoScale team is looking for a few curious souls who are ready to help us test and influence the development and future of our…

Reaffirming InfoScale’s Commitment to Secure Infrastructure in an Evolving World

Secure your mission-critical workloads with a defense-in-depth strategy that combines high availability with advanced encryption, RBAC, and…

Bölüm 6: RabbitMQ Clustering ve High Availability

RabbitMQ cluster’ı Erlang’ın dağıtık gücüyle ayakta: node’lar fully-connected, metadata senkron; mesaj dayanıklılığı için Quorum Queue…

AWS OpenSearch Cross-Region Disaster Recovery -What Actually Happens During Failover

Overview

Building a Production-Ready Stack Part 2: High Availability with Percona MongoDB Replica Sets

This article serves as Part 2 of the series “Building a Production-Ready Stack”, following the initial setup of Spring Boot 3 with PerconaDB

Handling Cache Stampede in High-Traffic Systems (with Redis)

In large-scale, high-traffic systems, cache (for example, Redis) is often seen as the performance “savior.” But with the wrong patterns…

ACID vs BASE: Choosing the Right Consistency Model for Modern Databases

Modern applications run on data, and how that data is stored, updated, and accessed can make or break performance, reliability, and user…

A Real-World VRRP Issue: How Duplicate VRIDs Caused Cross-Site HA Confusion

Introduction