Day 9

Today, I:

• watched Database Sharding! DDIA Chapter 6 — video walkthrough of partitioning (sharding), key-range vs hash, secondary indexes, rebalancing, and request routing
• watched How to Pass Technical Interviews Without Grinding LeetCode — focus on 15–20 core patterns (two pointers, sliding window, DP, etc.) instead of hundreds of random problems
• watched Books That Made Me A CRACKED Backend Dev — seven books: Clean Code, The Pragmatic Programmer, DDIA, System Design Interview, Database Internals, Release It, Fundamentals of Software Architecture
• watched SSH Explained in 2 Minutes! — protocol for secure remote access, encrypted channel, client/server, password vs SSH key authentication
• watched Devs can no longer avoid learning Git worktree — multiple working dirs from one repo for hotfixes, PR review, and running agentic AI in a separate worktree