Cache (Upstash Redis, ephemeral patterns)

Generated from mcp/patterns.registry.json — do not edit by hand; change the registry and run bun run patterns:build.

Index card — the docs below are the canonical explanation; deep-tier pattern pages additionally carry invariants and emulation notes.

Category: Databases & Storage · Tier: light · Risk: medium — external managed service (Upstash Redis)

In-memory key-value store on Upstash Redis, reached over HTTP REST, used for rate limiting, the circuit breaker, and other ephemeral counters.

When to use: Use when a feature needs fast, short-lived state, such as counters or locks, without Postgres's durability guarantees.

Docs

• docs/stack/data/redis.md (GitHub · GitLab)
• docs/stack/ops/caching.md (GitHub · GitLab)

Code

• src/lib/server/cache/ (GitHub · GitLab)

Proof

• /showcases/db/cache/connection
• /showcases/db/cache/patterns
• /showcases/db/cache/ephemeral

Machine-readable record: databases-cache in mcp/patterns.registry.json.