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Ops Community

A leading IT operations community where professionals share and grow together.

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Ops Community
Ops Community
Nov 23, 2025 · Databases

How to Recover Accidentally Dropped MySQL Data in 48 Hours – A Complete Step‑by‑Step Guide

This guide walks you through a full disaster‑recovery workflow for MySQL, covering emergency read‑only switching, pinpointing the deletion time via binlog, preparing a recovery instance, restoring the latest full backup with Xtrabackup or mysqldump, applying incremental binlog changes, verifying data integrity, and safely switching traffic back to the restored database.

BackupData RecoveryMySQL
0 likes · 42 min read
How to Recover Accidentally Dropped MySQL Data in 48 Hours – A Complete Step‑by‑Step Guide
Ops Community
Ops Community
Nov 22, 2025 · Databases

Why Is Your SQL Slow? 7 Common MySQL Index Failure Scenarios Explained

This article examines why MySQL queries can become sluggish by analyzing seven typical situations where indexes become ineffective, provides step‑by‑step testing procedures, performance comparisons, troubleshooting tips, and best‑practice recommendations to restore optimal query performance.

Index OptimizationMySQLPerformance Tuning
0 likes · 37 min read
Why Is Your SQL Slow? 7 Common MySQL Index Failure Scenarios Explained
Ops Community
Ops Community
Nov 19, 2025 · Operations

Why Are Your TCP Packets Dropping? A 3‑Day Capture Walkthrough to Kernel Parameter Fixes

This guide walks you through diagnosing intermittent TCP packet loss and latency spikes on Linux servers, from initial symptom checks and anti‑pattern warnings to detailed sender‑side, network‑link, and receiver‑side investigations using tcpdump, netstat, ss, and kernel tuning, complete with scripts, best‑practice tables and FAQ.

Kernel ParametersLinuxNetwork Diagnostics
0 likes · 37 min read
Why Are Your TCP Packets Dropping? A 3‑Day Capture Walkthrough to Kernel Parameter Fixes
Ops Community
Ops Community
Nov 10, 2025 · Operations

8 Essential Skills Every Senior Ops Engineer Must Master

This article outlines the eight critical competencies—from Linux and scripting to cloud, container orchestration, and automation—that define the career progression of an operations professional and explains why mastering them is key to advancing to senior roles.

Container OrchestrationLinuxSystem Administration
0 likes · 3 min read
8 Essential Skills Every Senior Ops Engineer Must Master
Ops Community
Ops Community
Nov 10, 2025 · Operations

100 Essential Operations Interview Questions to Ace Your DevOps Interview

This article compiles 100 common operations interview questions covering DevOps principles, CI/CD, infrastructure as code, monitoring, automation, containerization, Kubernetes, Linux system administration, security, and shell scripting, providing a comprehensive study guide for candidates aiming for roles at major tech firms.

CI/CDDevOpsInfrastructure as Code
0 likes · 4 min read
100 Essential Operations Interview Questions to Ace Your DevOps Interview
Ops Community
Ops Community
Nov 9, 2025 · Operations

How to Achieve 99.99% Uptime with Keepalived Dual‑Node HA

This guide explains how to design a high‑availability architecture using Keepalived's VRRP‑based active‑passive failover, covering technical features, applicable scenarios, environment requirements, step‑by‑step installation and configuration for services like Nginx, MySQL and Redis, plus best practices, troubleshooting, monitoring and backup strategies.

KeepalivedLoad BalancingMySQL
0 likes · 46 min read
How to Achieve 99.99% Uptime with Keepalived Dual‑Node HA
Ops Community
Ops Community
Nov 8, 2025 · Operations

Mastering Nginx Reverse Proxy & Load Balancing: Best Practices for High‑Performance Deployments

This comprehensive guide walks you through Nginx reverse proxy and load balancing fundamentals, key features, suitable scenarios, environment prerequisites, step‑by‑step installation, core configuration, performance tuning, security hardening, high‑availability designs, troubleshooting, monitoring, backup strategies, real‑world case studies, and advanced learning paths for production‑grade deployments.

Performance optimizationhigh availabilitysecurity
0 likes · 56 min read
Mastering Nginx Reverse Proxy & Load Balancing: Best Practices for High‑Performance Deployments
Ops Community
Ops Community
Nov 6, 2025 · Big Data

Zero Data Loss Kafka Cluster Scaling: From 3 to 10 Nodes – A Complete Guide

This comprehensive guide walks you through expanding or shrinking a production‑grade Kafka cluster—covering prerequisites, anti‑pattern warnings, environment matrices, step‑by‑step expansion and contraction procedures, partition rebalancing principles, monitoring, best practices, and troubleshooting—to ensure zero data loss during scaling.

KafkaPartition RebalancingZero Data Loss
0 likes · 27 min read
Zero Data Loss Kafka Cluster Scaling: From 3 to 10 Nodes – A Complete Guide
Ops Community
Ops Community
Nov 5, 2025 · Databases

Mastering PostgreSQL Replication: Diagnose Lag, Split‑Brain, and Fix Common Issues

This comprehensive guide walks you through troubleshooting PostgreSQL physical (stream) replication, covering environment prerequisites, anti‑pattern warnings, step‑by‑step diagnostics for replication lag, split‑brain scenarios, replication slot problems, monitoring setup with Prometheus, and best‑practice recommendations to keep your primary‑standby cluster healthy.

PostgreSQLTroubleshootingWAL
0 likes · 35 min read
Mastering PostgreSQL Replication: Diagnose Lag, Split‑Brain, and Fix Common Issues