Posts

All the articles I've posted.

• Envoy Proxy: The Invisible Backbone of Microservices

  6 Apr, 2026

  system design basics - Envoy proxy, north-south vs east-west traffic, its operating modes, how it competes with Nginx, and its relationship with Istio.

• System Design - Proxy vs Reverse Proxy

  5 Apr, 2026

  system design basics - forward proxy vs reverse proxy, differences, use cases, and examples

• LeetCode 874 Walking Robot Simulation

  5 Apr, 2026

  Solutions for LeetCode 874, medium, tags: array, hash table, simulation.

• LeetCode 631 Design Excel Sum Formula

  4 Apr, 2026

  Solutions for LeetCode 631, hard, tags: design, graph, depth-first search, topological sort.

• LeetCode 721 Accounts Merge

  31 Mar, 2026

  Solutions for LeetCode 721, medium, tags: array, hash table, string, depth-first search, breadth-first search, union find, sorting.

• System Design - How TiDB TSO (Timestamp Oracle) Works

  28 Mar, 2026

  How TiDB's Timestamp Oracle (TSO) works: architecture, 64-bit timestamp layout, allocation algorithm, etcd persistence, client batching, and source code walkthrough from the tikv/pd repository.