cloudflare-kv

Status : Production Ready ✅ Last Updated : 2026-01-20 Dependencies : cloudflare-worker-base (for Worker setup) Latest Versions : wrangler@4.59.2, @cloudflare/workers-types@4.20260109.0 Recent Updates (2025) : wrangler.jsonc: Basic Usage: Critical Limits: Guidelines : Minimum 60s, use for read-heavy workloads (100:1 read/write ratio) KV performance varies based on key temperature: Post-August 2025 Improvements : Optimization : Use key coalescing to make cold keys benefit from hot key caching: CacheTtl helps cold keys : For infrequently-read data, cacheTtl reduces cold read latency. Trade-off : Coalescing requires read-modify-write for updates KV is eventually consistent across Cloudflare's global network (Aug 2025 redesign: hybrid storage, 1/second writes per key, critical data Need strong consistency? Use Durable Objects Source : Redesigning Workers KV IMPORTANT : CLI commands default to local storage . Add --remote flag to access production/remote data. Connect local Workers to production KV namespaces during development: wrangler.jsonc: How It Works: Benefits: ⚠️ Warning : Writes affect production data. Consider using a staging namespace with remote: true instead of production. Version Support: Source : Remote bindings architecture Critical : 1 write/second per key (429 if exceeded), bulk operations count as 1 operation, namespace limit increased from 200 → 1,000 (Jan 2025)...