natuleadan Elysia Cache Tags
When to use
When you need fine-grained cache invalidation beyond simple key-based TTL. Tags let you invalidate related cache entries in bulk.
References
| Topic | File |
|---|---|
| 3-level tag system | references/tag-levels.md |
| Cache-aside with tags | references/remember-with-tags.md |
| Invalidation chains | references/invalidation-chains.md |
| Signed URL caching | references/signed-url-cache.md |
Quick checklist
- Level 1: entity-specific tag (
cache:tags:{domain}:{entityId}) - Level 2: domain collection tag (
cache:tags:{domain}) - Level 3: cross-domain tag (
cache:tags:cross:{scope}) - Use
setWithTags(key, data, tags, ttl)when storing cached values - Use
invalidateTags([tag1, tag2, ...])to batch-invalidate - Tag sets TTL = 2x value TTL (ensures tags outlive their members)
- For signed URLs, cache the URL for 3500s (just under the 3600s expiry)