Dropbox System Design: How Cloud File Storage Works
How chunking, deduplication, delta sync, and a metadata service let Dropbox store and sync billions of files reliably
Search across 266 posts, 23 explainers, and 87 topics
How Java Debugging Works: Inside JPDA, JDWP, and JDI
How the JVM lets you set breakpoints, step through code, and attach a debugger to a running Java process, explained from the inside out
How the JVM Works: From Bytecode to Native Code
A clear, practical walk through how the Java Virtual Machine loads, verifies, executes, and optimizes your code at runtime
Emergent Leader Pattern in Distributed Systems
How peer-to-peer clusters pick a coordinator by age, without ever running a leader election
Columnar Databases Explained: ClickHouse, BigQuery, and Redshift
How column-oriented storage, compression, and vectorized execution make analytical queries 10 to 100 times faster
Wide Column Stores Explained: Cassandra, Bigtable, and ScyllaDB
How the partition key, clustering key, and LSM storage make wide column databases scale to millions of writes per second
Request Waiting List Pattern in Distributed Systems
How a cluster node parks a client request while it collects quorum responses from other nodes, then answers at exactly the right moment
DDoS Attacks: How They Work and How to Protect Your App
A guide to distributed denial-of-service attacks, the three layers they hit, and the defenses that actually stop them
Payment System Design: Ledger, Idempotency, and Settlement
How to design a Stripe-style payment system that never charges twice, keeps an auditable ledger, and reconciles every dollar
Designing Database Isolation for B2B Multi-Tenant SaaS
Shared schema, schema-per-tenant, and database-per-tenant compared, plus how PostgreSQL RLS, tenant context, and hybrid tiers keep customer data safe
Request Pipeline Pattern in Distributed Systems
Why one-request-at-a-time wastes your network, and how sending many requests without waiting for replies cuts latency and lifts throughput
Consistent Core Pattern in Distributed Systems
How a small, strongly consistent cluster lets a huge data cluster coordinate itself without drowning in consensus
CDN System Design: How Content Delivery Networks Work
How edge servers, anycast routing, and tiered caching move content close to users, cut latency, and protect your origin at global scale
