A technical note on OS configuration, shared disks, ASMLib, and Grid Infrastructure initial setup for building a 2-node Oracle 19c RAC environment on a VMware virtualization platform.
This article explains how to deploy FRP (Fast Reverse Proxy) to safely expose local services behind NAT or firewalls, daemonize it using systemd, and configure secure connections using STCP.
A practical technical note summarizing the cooperative operation of Celery Beat and Workers, scheduling configurations, error handling, and a comparison with system Cron.
This article explains the process of implementing automated deployment to a local Kubernetes environment using GitHub Actions and Self-Hosted Runners, covering practical troubleshooting such as PEM parsing errors and network resolution.
This article explains diagnostic commands based on Finite State Machine (FSM) transition states, identification flows for the 7 major root causes, and proactive design using BFD for rapid recovery during BGP session disconnections.
A technical guide for backend engineers covering the OSI 7-layer model, the evolution from HTTP/1.1 to HTTP/3, DNS resolution flows, the operating principles of reverse proxies and L4/L7 load balancers, and the end-to-end request lifecycle.
Explains the technical differences, security characteristics, and the constraint of mutual exclusivity within the same runner for Docker-in-Docker (DinD) and Docker-out-of-Docker (DooD) in GitLab CI/CD environments.
Technical specifications for SNS development using Spring Boot 3.3 and React. Explains the roadmap for building an MVP, including JWT authentication, JPA data models, and feed generation logic.
Technical analysis of B-Tree index internals, storage node layout, and query performance optimization strategies for enterprise infrastructure.
A technical explanation of the evolutionary process of Python web interfaces (CGI, WSGI, ASGI), modern WAS configurations using Gunicorn and Uvicorn, and architectural differences between Django and FastAPI.