Course outline

01 · HTTP & REST APIs

02 · Databases & Persistence

03 · Authentication & Authorization

04 · API Design & gRPC

05 · Caching, Queues & Background Jobs

06 · Production-Ready Services

07 · Advanced Auth & Tenant Security

08 · Performance & Caching at Scale

09 · Testing & Release Confidence

Stage 3 · Build

Caching, Queues & Background Jobs

Redis Basics

Use Redis strings, hashes, TTLs, pipelining, go-redis clients, and connection management.

7 min readBuilding Backend ApplicationsBuild

What Is Redis

Redis is an in-memory data store used for caching, session storage, rate limiting, and message queues. It supports multiple data types, atomic operations, and pub/sub messaging. It is the most popular choice for backend caching.

Data Types

Type	Use Case	Commands
String	Simple values, counters, locks	GET, SET, INCR, APPEND
Hash	Object storage, user sessions	HGET, HSET, HGETALL
List	Message queues, recent items	LPUSH, RPUSH, LPOP, LRANGE
Set	Unique items, tags, followers	SADD, SMEMBERS, SINTER
Sorted Set	Leaderboards, time-series	ZADD, ZRANGE, ZRANK

go-redis Client

Goconnecting-to-redis.go

22 linesLn 1, Col 1Go

go-redis is the standard Redis client for Go. Configure pool size to match your concurrency. Set timeouts to prevent hanging connections.

Pipelining

Pipelining sends multiple commands in a single network round-trip. This dramatically reduces latency when executing many Redis operations.

Gousing-pipelining.go

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Pipeline creates a batch of commands. Exec sends them all at once. Results are available from each command object. This is much faster than sending commands individually.

TTL and Expiry

Gosetting-and-checking-ttl.go

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Every key can have a TTL. After the TTL expires, Redis automatically deletes the key. Use TTL for cache entries, sessions, and temporary locks.

Connection Management

Gohealth-checking-and-monitoring.go

18 linesLn 1, Col 1Go

Monitor pool stats to detect connection exhaustion. High miss count means your cache hit rate is low. Timeouts indicate the pool is saturated.

Use connection pooling

Redis connections are lightweight but not free. go-redis pools connections automatically. Set PoolSize to 2x your expected concurrency. Monitor idle connections to avoid stale connections.

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