The design library
Building blocks, complete architectures, and variations worth comparing. Search by the problem you want to solve or a component you want to understand.
Classic designOfficial
Thousands of GPUs shared by many teams: gang admission, topology-aware placement, quotas with lending, checkpointed preemption and failure recovery: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Signed HTTPS callbacks for a billion events a day, at least once, retried for three days, with no endpoint able to slow another: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Billions of files, hundreds of petabytes, one strongly consistent tree: a namespace partitioned by directory, chunk servers, replication, repair, erasure coding. One-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
One set of tags across Jira issues, Confluence pages and Bitbucket pull requests: batch renders, tag pages that never leak, suggestions, popular tags: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Record every money movement as balanced, append-only entries, exactly once, with holds, payouts and reconciliation: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Ten terabytes of logs an hour from host agents through Kafka into tiered OpenSearch and S3, with regex search, live tail and exceptions grouped into issues: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Find restaurants that deliver to you, check out without double charges, time couriers to the kitchen and track them live: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Design a team chat app like Slack: channels and DMs in real time, threads, unread counts and search. One-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Count 4 million moving drivers per map cell from a million pings a second, and serve the density to a million viewers as cached map tiles: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Rank 200 million players in real time with sharded Redis sorted sets, count every game exactly once, and close a season fairly: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Real-time rated chess with server-validated moves, lag-compensated clocks, pairing by rating and a million watchers on one game: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Turn 10 pushes a second into job graphs on ephemeral runners, with fair queues per pool, leases fenced by attempt and live logs: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Buy the cheapest offer under a maximum price from 1,000 sellers: cached offers, coalesced quotes, a hold-order-capture saga, open requests: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Ten charities, three days, $100 M: charge through a third-party processor exactly once, queue the broadcast spikes, keep live totals on sharded counters. One-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Dish reviews only from customers who ordered them, votes counted from a change stream, reviews ranked by the Wilson bound, payouts made exactly once: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Nights as counted inventory, holds that never double-book, search that knows availability, and payments that reconcile: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Deny requests by caller address, range or URL at a global edge, with lists from governments, threat feeds and detection reaching 300 proxies in seconds: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Push, email, SMS and in-app for a billion deliveries a day: priorities that never wait, promotions that never arrive late, no duplicates a user would notice. One-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Every committed change in Aurora and DynamoDB, read from the log and delivered in order per row to search, caches, Redshift and an S3 lake: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
The database under a metrics platform: a WAL and head block, compressed chunks, a label index, rollups, compaction and blocks in S3: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Nearest-neighbour search over a billion embeddings: HNSW, IVF-PQ and disk graphs, filters, segments, sharding, and hybrid search with re-ranking: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Unique visitors, top pages, seen URLs and p99 latency over 10 B events a day with HyperLogLog, Count-Min, Bloom filters and t-digests: one-hour boards for junior, senior and staff, with the theory behind them.
Classic designOfficial
Radius, k-nearest and map-box search over places that rarely move and drivers that ping every few seconds: R-trees, geohash, H3 and S2 cells, Redis GEO and OpenSearch. One-hour boards for junior, senior and staff, with the theory.
Classic designOfficial
A coordination service like ZooKeeper: znodes, sessions and watches, a ZAB quorum of five with observers, and the recipes for elections and locks: one-hour boards for junior, senior and staff, with the theory behind them.