Redis

Redis is an in-memory data store. It is extremely fast for caching, session storage, rate limiting, pub/sub, and short-lived structures. In dFlow it is created as a Database service like Postgres or MySQL, with its own Overview and connection string.

It is not a substitute for a primary transactional database when you need durable relational data—pair Redis with Postgres, MySQL, or MongoDB when you need both.

Concepts: Databases overview.

When to choose RedisCopy Anchor Link

Choose Redis when low latency and in-memory semantics fit the workload (cache, ephemeral state, coordination). Choose Postgres or another SQL/document database for the system of record unless your architecture intentionally uses Redis as primary storage (uncommon for general apps).

Create and deployCopy Anchor Link

1. Applications → Environment → Add New → Add service → Database → Redis.
2. Create Service → Deploy.
3. Wait for success.

Connection details on OverviewCopy Anchor Link

After deploy you typically see:

• A redis://… URL (often including authentication).
• Username — the UI may show default as a label; that is a common Redis convention, not necessarily a custom account you created.
• Password, host, and port.

There may be no separate database name row like SQL engines; many clients only need the URL or HOST + PORT + PASSWORD.

Public credentials appear after Expose. Unexpose before Stop if exposed.

Link your app: reference variablesCopy Anchor Link

Variables → { } menu:

{{ my-redis.REDIS_URI }}

Internet access (Expose)Copy Anchor Link

Redis uses one public port when exposed, similar to Postgres and MySQL. Prefer internal URLs for services that run inside dFlow.

Day-to-day actionsCopy Anchor Link

Restart, Stop, and Expose / Unexpose follow the same rules as other database services. See Databases overview.

TroubleshootingCopy Anchor Link

Database troubleshooting

Useful linksCopy Anchor Link

• Redis
• Redis source