CrackingWalnuts
Explore
DSA Templates
35Algorithm patterns & code templates
System Design
37End-to-end architecture problems
Low Level Design
67Design patterns & practical code
Key Technologies
59Deep dives into core tech
Infrastructure
35Production systems & operations
Distributed Systems
38Consensus, replication & more
Linux Internals
84Kernel, networking & system calls
Cheat Sheets
24Quick reference cards for interviews
Recent Posts
System Design: Object Storage (Erasure Coding, Flat Namespace, and Exabyte Scale)
System Design
Mar 31, 2026 · 51 min
System Design: AI Software Engineer (From Autocomplete to Autonomous App Builder)
System DesignAI
Mar 25, 2026 · 94 min
RAG and LLM Platform at Scale: Ingestion, Retrieval, Generation, and Evaluation for 10M Queries/Day
System DesignAI
Mar 22, 2026 · 105 min
Staff+ Engineering
Leadership
VPTechnical Due Diligence
“Technical due diligence should evaluate architecture, team capability, and tech debt in equal measure”
Org Design
GrowthOn-Call Rotation Design
“Sustainable on-call rotations need a minimum of 6-8 people. Fewer than that and individuals end up on call too frequently, which leads to burnout and attrition”
530+Articles
27Interactive Tools
16Categories
6Learning Stages
Learning Path
Discover Today
RocksDB
The embedded LSM-tree engine that powers half the databases you already use
Object Storage & Data Lake
Stores unstructured data (files, images, logs, backups) as objects with metadata in flat namespaces
Two-Phase Commit (2PC)
2PC solves the atomic commit problem: either all participants in a distributed transaction commit, or all abort. There is no state where participant A committed and participant B aborted. This is the guarantee that makes distributed transactions possible