--- title: "Vijaya Rajeev Bollu (@thinkwithops) | Hashnode" description: "I explain how software and AI systems really work, then build them: DevOps, SRE, ML engineering, MLOps and LLMOps. ThinkWithOps on YouTube." url: "https://hashnode.com/@thinkwithops" --- @thinkwithops # Vijaya Rajeev Bollu @thinkwithops · Kitchener,Canada · Joined March 2026 ### [\# Why a Program Can Fail Before main() Runs on Linux](https://thinkwithops.hashnode.dev/why-a-program-can-fail-before-main-runs-on-linux?utm_source=hashnode&utm_medium=feed) Follow a program from source to exit on Linux: fork, execve, the dynamic linker and exit codes 126, 127 and 137 explained. 8 min read · [thinkwithops.hashnode.dev](https://thinkwithops.hashnode.dev/why-a-program-can-fail-before-main-runs-on-linux?utm_source=hashnode&utm_medium=feed) [Oct 30](https://hashnode.com/posts/why-a-program-can-fail-before-main-runs-on-linux/6ae415be19da51502f5e7ca2) ### [\# ArgoCD Silently Stuck at "Unknown" Sync Status? It Was a Kubernetes Version, Not ArgoCD](https://thinkwithops.hashnode.dev/argocd-silently-stuck-at-unknown-sync-status-it-was-a-kubernetes-version-not-argocd?utm_source=hashnode&utm_medium=feed) ArgoCD Applications sat at Sync Status Unknown with no error. Root cause: Kubernetes 1.35 dropped /openapi/v2, which ArgoCD's diff engine needs. 4 min read · [thinkwithops.hashnode.dev](https://thinkwithops.hashnode.dev/argocd-silently-stuck-at-unknown-sync-status-it-was-a-kubernetes-version-not-argocd?utm_source=hashnode&utm_medium=feed) [Sep 16](https://hashnode.com/posts/argocd-silently-stuck-at-unknown-sync-status-it-was-a-kubernetes-version-not-argocd/6aaaa106711fe06b95b4d994) ### [\# Can My AWS EKS Cluster Handle 100,000 Users? Load Testing + Autoscaling, Proven Live](https://thinkwithops.hashnode.dev/can-my-aws-eks-cluster-handle-100-000-users-load-testing-autoscaling-proven-live?utm_source=hashnode&utm_medium=feed) k6 load testing an AWS EKS cluster while HPA and Karpenter autoscale live — nodes climbing 2 to 8, proven with a real-time Grafana dashboard 4 min read · [thinkwithops.hashnode.dev](https://thinkwithops.hashnode.dev/can-my-aws-eks-cluster-handle-100-000-users-load-testing-autoscaling-proven-live?utm_source=hashnode&utm_medium=feed) [Sep 4](https://hashnode.com/posts/can-my-aws-eks-cluster-handle-100-000-users-load-testing-autoscaling-proven-live/6a9ae09f4ab24bd8121a3748) ### [I Benchmarked 3 Local LLMs on My Laptop — Here's What the Numbers Actually Show](https://thinkwithops.hashnode.dev/i-benchmarked-3-local-llms-on-my-laptop-here-s-what-the-numbers-actually-show?utm_source=hashnode&utm_medium=feed) Run llama3.2, phi3, mistral locally with Ollama. Benchmark P99 latency, tokens/sec, and memory. FastAPI wrapper with JSON validation included. 6 min read · [thinkwithops.hashnode.dev](https://thinkwithops.hashnode.dev/i-benchmarked-3-local-llms-on-my-laptop-here-s-what-the-numbers-actually-show?utm_source=hashnode&utm_medium=feed) [Jun 5](https://hashnode.com/posts/i-benchmarked-3-local-llms-on-my-laptop-here-s-what-the-numbers-actually-show/6a22f263857478689f4ff109) ### [\# I Built a RAG System That Enforces Its Own Citations — And Blocks Its Own Merges](https://thinkwithops.hashnode.dev/i-built-a-rag-system-that-enforces-its-own-citations-and-blocks-its-own-merges?utm_source=hashnode&utm_medium=feed) Build a RAG system with BM25+vector search, Cohere reranking, citation enforcement, and Ragas CI gates that block bad PRs automatically. 6 min read · [thinkwithops.hashnode.dev](https://thinkwithops.hashnode.dev/i-built-a-rag-system-that-enforces-its-own-citations-and-blocks-its-own-merges?utm_source=hashnode&utm_medium=feed) [May 14](https://hashnode.com/posts/i-built-a-rag-system-that-enforces-its-own-citations-and-blocks-its-own-merges/6a06570bbaf09db7a6482b6b)