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Writing on GPUs, LLMs, MLOps, Kubernetes — and mindset · 3517 posts
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FlashAttention Paper Analysis: Revolutionizing Transformer Training and Inference with IO-Aware Exact Attention
An in-depth analysis of the FlashAttention series (v1 through v3). Covers the tiling strategy of the IO-aware algorithm, GPU SRAM/HBM memory hierarchy utilization, backward pass recomputation, parallelism improvements in
2026-03-09 · 22 min read #ai-papers#flash-attention#transformer#gpu-optimization#attention-mechanismDPO (Direct Preference Optimization) Paper Deep Analysis — LLM Alignment Without RLHF
From mathematical principles of DPO to implementation, comparison with RLHF, and variants like IPO/KTO/ORPO — an in-depth analysis of LLM preference optimization from a practical perspective.
2026-03-09 · 20 min read #ai-papers#dpo#rlhf#llm-alignment#preference-optimizationRay Serve Model Serving Platform Building Guide — Autoscaling, Multi-Model, and Production Deployment
A comprehensive overview of Ray Serve architecture, LLM model serving deployment, autoscaling, multi-model patterns, and KubeRay operations with practical code examples.
2026-03-09 · 26 min read #ai-platform#ray-serve#model-serving#kuberay#mlopsComparing LLM Production Monitoring Platforms: A Practical Operations Guide for LangSmith, LangFuse, and Arize Phoenix
A comprehensive comparison guide of three LLM production monitoring platforms (LangSmith, LangFuse, Arize Phoenix). Covers trace collection, prompt version management, evaluation pipelines, cost monitoring, quality dashb
2026-03-09 · 23 min read #ai-platform#llm-monitoring#langsmith#langfuse#arizeGrafana OnCall and Incident Management Automation: From PagerDuty Integration to Runbook Automation
A practical guide to building incident management automation with Grafana OnCall. Covers on-call scheduling, escalation policies, PagerDuty/Slack integration, runbook automation, and alert fatigue reduction strategies wi
2026-03-08 · 30 min read #observability#grafana-oncall#incident-management#pagerduty#runbookThe Complete Guide to TCP/IP Connection Debugging in Production
A practical guide covering TCP 3-way handshake, connection state analysis, SYN flood defense, packet capture with tcpdump/Wireshark, kernel tuning parameters, and real-world debugging scenarios.
2026-03-08 · 15 min read #networking#tcp#ip#troubleshooting#devopsThe Complete HTTP/HTTPS Troubleshooting Guide - Production Debugging Techniques
A comprehensive guide covering HTTP status code analysis, TLS handshake debugging, certificate chain validation, advanced curl techniques, 502/503/504 error resolution, CORS issues, redirect loops, HTTP/2 and HTTP/3 debu
2026-03-08 · 22 min read #networking#http#https#tls#troubleshootingComplete Guide to Cloud Network Architecture Troubleshooting — Practical Debugging for AWS, GCP, and Azure
Covers everything from VPC networking fundamentals, Security Group and NACL debugging, VPC Peering, Transit Gateway, Flow Logs analysis, NAT/IGW issues, cross-region connectivity, to DNS troubleshooting in cloud environm
2026-03-08 · 16 min read #networking#cloud#aws#troubleshooting#vpcObservability Data Pipeline Cost Optimization: Sampling, Filtering, and Tiering Strategies
A strategy guide for solving cost issues from observability data explosion. Covers OpenTelemetry Collector-based sampling policies, log filtering pipelines, metric cardinality management, storage tiering architecture, an
2026-03-08 · 25 min read #observability#cost-optimization#sampling#opentelemetry#telemetry-pipelineComplete Guide to Network Performance Analysis: Measurement, Diagnosis, and Monitoring
A comprehensive guide covering network performance metrics, bandwidth testing with iperf3/mtr/netperf, TCP window analysis, MTU troubleshooting, and Prometheus/Grafana monitoring for practical network diagnostics.
2026-03-08 · 15 min read #networking#performance#monitoring#troubleshootingThe Complete Guide to Container & Kubernetes Network Debugging
A systematic guide to debugging container networking, from Docker networking models to Kubernetes CNI, Service DNS, Network Policies, and Calico/Cilium troubleshooting with practical commands.
2026-03-08 · 12 min read #networking#kubernetes#docker#container#troubleshootingNetwork Troubleshooting Complete Guide — 6-Part Series Overview
An index post for a 6-part series on systematically diagnosing and resolving real-world network issues. Covers every layer from DNS resolution to cloud network architecture.
2026-03-08 · 8 min read #networking#troubleshooting#devops#sreDNS Troubleshooting Complete Guide - From Fundamentals to Kubernetes
Understand how DNS resolution works and learn systematic approaches to debugging common DNS issues in production. Covers dig, nslookup, and other tools, along with Kubernetes CoreDNS troubleshooting with practical exampl
2026-03-08 · 14 min read #networking#dns#troubleshooting#devopsLLM Safety and Red Teaming Practical Guide: From Adversarial Defense to Guardrail Implementation
A practical guide to LLM safety covering red teaming methodology, adversarial attack defense, and guardrail implementation.
2026-03-08 · 42 min read #llm#red-teaming#safety#guardrails#prompt-injectionLLM Routing and Cascade Strategy: Cost Optimization with Multi-Model Orchestration
Covers how to optimize cost with LLM routing and cascade strategies. Builds everything from query-complexity routing, model cascades, semantic routers and the FrugalGPT approach through to a production multi-model orches
2026-03-08 · 26 min read #llm#routing#cascade#model-orchestration#cost-optimizationComplete Guide to Japanese IT Company Onboarding: From First Day to Project Participation
Practical Japanese expressions for IT company onboarding from first day to project participation.
2026-03-08 · 42 min read #japanese#onboarding#business-japanese#it-company#self-introductionTurning Fun Psychology Tests into Self-Awareness: A Practical Playbook
A practical guide for turning popular workplace psychology tests from mere entertainment into genuine self-awareness and improved team communication.
2026-03-08 · 15 min read #psychology#self-awareness#habit#communication#historyTax Basics for Korean Office Workers: Year-End Settlement Operational Guide
An operational guide covering common mistakes in Korean year-end tax settlement, frequently missed deductions, a month-by-month preparation checklist, and document management routines.
2026-03-08 · 13 min read #finance#tax#year-end-settlement#korea#office-workerAlgorithmic Trading System Architecture with Python
A comprehensive guide to building algorithmic trading system architecture with Python, covering system design, order management, and risk controls.
2026-03-08 · 46 min read #finance#algorithmic-trading#python#backtesting#quantitative-financeKubernetes Velero Backup and Disaster Recovery Strategy
A comprehensive guide to Kubernetes backup and disaster recovery using Velero, covering backup policies, restore procedures, and cross-cluster migration.
2026-03-08 · 21 min read #kubernetes#velero#backup#disaster-recovery#migration