ClickHouse is a column-oriented database management system (DBMS) designed for Online Analytical Processing (OLAP). Unlike row-oriented databases (MySQL, PostgreSQL) where each row is stored together — efficient for retrieving full records — ClickHouse stores each column separately, making it extremely efficient for aggregation queries that scan specific columns across billions of rows. ClickHouse can process […]
🟠 High ⏱ 5–30 min Last verified: 10 June 2023 Affected versions: Windows Server 2022 📖 ~2 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]
Introduction Setting up configure mysql innodb cluster on oracle linux 9 on a Oracle Linux 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure MySQL InnoDB Cluster on Oracle Linux 9, with all the commands you need, the SELinux and firewalld considerations to […]
Why IIS Security Hardening Matters A default IIS installation on Windows Server 2022 is functional but not fully hardened. Out of the box, IIS reveals version information in response headers, serves directory listings for unconfigured virtual directories, may support legacy TLS versions, and lacks the HTTP security headers that modern browsers rely on to prevent […]
🟡 Medium ⏱ 5–30 min Last verified: 9 June 2023 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]
How to Install Ansible and Manage Windows Servers with Ansible on Windows Server 2022 Ansible is an agentless automation platform that uses SSH for Linux and WinRM for Windows to execute configuration management tasks, application deployments, and orchestrated workflows across infrastructure. Unlike agent-based tools, Windows servers do not require any Ansible software installed — only […]
PHP-FPM (FastCGI Process Manager) is the recommended interface between Nginx and PHP on RHEL 8, replacing the older mod_php approach with a more flexible and performant process pool model. Rather than embedding PHP inside the web server, PHP-FPM runs as a separate systemd-managed service that Nginx communicates with over a Unix socket, isolating the two […]
How to Configure Storage for Hyper-V on Windows Server 2022 Storage configuration is one of the most consequential decisions when deploying Hyper-V on Windows Server 2022. The wrong storage format, controller type, or placement strategy can throttle VM performance, limit scalability, and complicate disaster recovery. This guide covers all storage options available in Hyper-V on […]
Linux kernel parameters control how your system allocates resources, handles network connections, and manages memory. On RHEL 8, the sysctl utility provides a clean interface for reading and writing these parameters at runtime, while drop-in configuration files under /etc/sysctl.d/ make changes persistent across reboots. Properly tuned kernel parameters can significantly improve throughput, reduce latency, and […]
How to Set Up a Local Container Registry with Harbor on RHEL 7 Harbor is a CNCF-graduated open-source container registry that extends a plain Docker registry with enterprise features: role-based access control (RBAC), replication policies, vulnerability scanning, content trust, and a web-based management UI. Running Harbor on your own RHEL 7 infrastructure means your container […]
