Redis Code Tours - Intraview Explore

Redis C redis/redis

Walk through README orientation, the root Makefile, the redis-server main() entry, the runtest Tcl harness, the src/commands/ command-definition pattern, CONTRIBUTING.md and the tri-license, and a pointer to the event loop.

7 stops ~18 min

Prerequisites: Comfortable reading C (you do not need to write it, just trace the logic), Familiarity with make and a POSIX shell

credisfirst-contributionbuildtcl-tests

Walk through the Redis event loop, command dispatch, data structures, and persistence layer.

8 stops ~25 min

Prerequisites: Basic C reading ability, Understanding of key-value stores

architectureevent-looppersistencedata-structures

How a replica connects, bootstraps from an RDB snapshot, and stays current through command propagation

7 stops ~25 min

Prerequisites: Comfortable reading C (you don't need to write it, just follow the logic), Basic understanding of Redis as a primary/replica system: what REPLICAOF does, Familiarity with the concept of fork() and copy-on-write memory is helpful but not required

replicationpsynchigh-availabilitydistributed-systems

How Redis stores an append-only log in a radix tree, delivers messages to consumer groups, and tracks unacknowledged entries in the pending entries list

7 stops ~30 min

Prerequisites: Familiarity with Redis commands: XADD, XREAD, XREADGROUP, XACK, XCLAIM, XTRIM, Comfortable reading C structs and pointer manipulation, Basic understanding of hash tables or trees as index structures

streamsconsumer-groupsradix-treexaddxreadgroup

How Sentinel detects failures, elects a leader, and promotes a replica without human intervention

7 stops ~30 min

Prerequisites: Familiarity with Redis replication: what a master is, what a replica does, and what `SLAVEOF` means, Comfortable reading C structs and flag bitmasks, Basic understanding of distributed consensus concepts (majority vote, epochs) is helpful but not required

sentinelhigh-availabilityfailoverraft

How Redis routes messages from publishers to subscribers using channel dicts, glob patterns, and automatic keyspace events

6 stops ~20 min

Prerequisites: Familiarity with the Redis `SUBSCRIBE`/`PUBLISH` commands from a client perspective, Comfortable reading C structs and pointer indirection, Understanding of hash tables (dict) and why lookup is O(1)

pubsubmessagingkeyspace-notificationssharded-pubsub

How Redis survives a restart: binary snapshots, append-only logs, and the hybrid mode that combines both

8 stops ~30 min

Prerequisites: Comfortable reading C (you don't need to write it, just follow the logic), Familiarity with what `fork()` does in Unix processes, Basic understanding of Redis data types: strings, hashes, lists, sets, sorted sets

persistencerdbaoffsyncforkdurability

How Redis distributes data across nodes, detects failures through gossip, and promotes replicas without human intervention

7 stops ~30 min

Prerequisites: Comfortable reading C (you don't need to write it, just follow the logic), Basic understanding of key-value stores and what a Redis shard means, Familiarity with CRC and hash functions is helpful but not required

clustergossipshardingfailoverhash-slots

From raw bytes to skip lists: the memory layouts that make Redis fast and compact

8 stops ~30 min

Prerequisites: Comfortable reading C structs and pointer arithmetic (you don't need to write it, just follow the layout), Basic understanding of Redis key-value types: what a list, set, hash, and sorted set are, Familiarity with the idea of memory alignment and struct packing is helpful but not required

data-structuresencodingsdsdictskiplistlistpack

Eight stops through the parsing, reply, and negotiation code that drives every Redis client connection

8 stops ~30 min

Prerequisites: Comfortable reading C (you do not need to write it, just trace the logic), Basic familiarity with TCP and the idea of a client sending text commands to a server, Having used a Redis client (e.g. `redis-cli`) at least once is helpful

respprotocolwire-formatresp3pipelining

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Redis Tours

Getting Started with Your First Contribution to Redis

Architecture Grand Tour

Redis Replication: How Primaries and Replicas Stay in Sync

Redis Streams: A Log With Consumer Groups

Redis Sentinel: Watch, Vote, Fail Over

Redis Pub/Sub: Channels, Patterns, and Keyspace Notifications

Redis Persistence Deep Dive: RDB, AOF, and the Hybrid

Redis Cluster: Sharding, Gossip, and Failover

Redis Data Structures & Encoding: How Values Live in Memory

RESP Protocol Deep Dive: How Redis Talks Over the Wire

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