## The short version

Move PostgreSQL data from Render PostgreSQL to Ample, one component at a time. Destination verified on Ample: a workspace-scoped table, an explicit state machine (draft to review to published) that rejects invalid transitions, and a cross-workspace read that returns nothing (transitions=true isolation=true). Source procedure: Take a logical backup with `pg_dump -Fc` using the external connection string. Not migrated automatically: Render's automatic backups and read replicas have no equivalent on the managed database. Cutover: Freeze writes with the user's go-ahead, take the final dump, restore, validate, redeploy with the managed DATABASE_URL, keep the Render database until confirmed. Rollback: keep the source untouched until you confirm; nothing at the source is changed or deleted by this guide.

## What it needs

- [Postgres](/content/discover/primitive/postgres/index.html): verified (Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.)

## Before you start

- Authorized access to the Render PostgreSQL source and its export tooling
- An inventory of every component in scope and out of scope
- A validated backup or copy before any cutover
- An Ample account token with servers:write, databases:read

## How to do it

1.  **Inventory the source**

List what Render PostgreSQL provides beyond the component you are moving. Out of scope here: Render's automatic backups and read replicas have no equivalent on the managed database.

2.  **Source step 1**

Take a logical backup with `pg_dump -Fc` using the external connection string

3.  **Source step 2**

Check the Postgres major version and extensions against the managed engine (PostgreSQL 16)

4.  **Source step 3**

Restore into a scratch managed database first and compare row counts

5.  **Provision and restore**

Deploy the app once so a managed PostgreSQL 16 database exists (or create one with `ample database create --engine postgres`), then restore the dump with pg_restore using its connection string; keep migrations idempotent.

```
    ample database create --name <db-name> --engine postgres
    ```
    
6.  **Validate before cutover**

Run the app's own checks and, for data, compare counts and checksums; the example checks are the pattern self-tests (/p/relational-records).

7.  **Cut over**

Freeze writes with the user's go-ahead, take the final dump, restore, validate, redeploy with the managed DATABASE_URL, keep the Render database until confirmed.

8.  **Rollback**

Point DNS or configuration back to the source. The source was never modified; deletion is a separate, user-executed step after validation.

## Tested examples

- **Express pattern fixture (destination)** (`tests/deploy-canaries/express-patterns`): Verified destination basis: relational records.

## How to know it worked

- destination app responds on its public URL (`/` on the live URL, expect ample canary express patterns)
- relational-records check from the destination example (`/p/relational-records` on the live URL, expect see the pattern fixture checks)
- data or object counts and checksums match the source

## Cost estimate

Estimated 10.00 USD per month (size prices from pricing.toml at build revision ca0b484a7a9957c573a88d3a32dc603c3c10135a).

- app server x1 `s-1vcpu-1gb`: 5.00 USD
- managed PostgreSQL database x1 `s-1vcpu-1gb`: 5.00 USD

## Verification evidence

- canary_run on 2026-09-21T02:34:39Z at revision `1d28ae0 (CLI 0.1.21)`: Destination side verified: the Express pattern fixture deployed on Ample (npm install, npm run build --if-present, npm run start on the node-22 template) and its checks passed (a workspace-scoped table, an explicit state machine (draft to review to published) that rejects invalid transitions, and a cross-workspace read that returns nothing (transitions=true isolation=true)). The source-side export from Render PostgreSQL is documented from the vendor's standard tooling and was not executed by this catalog's evidence. (expires 2027-03-20T02:34:39Z)

## Execution binding

No execution binding. This recipe is documentation only; nothing is executed automatically.

## Typed next actions

- Browse the catalog index (`GET /v1/catalog` on the api origin; authentication not required, approval not required)
- Search published recipes by intent, stack and constraints (`POST /v1/catalog/search` on the api origin; authentication not required, approval not required)
- Prepare a side-effect-free deployment plan for an authorized project (`POST /v1/catalog/plan` on the api origin; authentication required, approval not required)
- Read the existing agent authentication setup (`GET /mcp/setup` on the api origin; authentication not required, approval not required)
- Browse Render PostgreSQL (`GET /v1/catalog/nodes/migration%3Arender-postgresql` on the api origin; authentication not required, approval not required)
- Browse Relational records (`GET /v1/catalog/nodes/pattern%3Arelational-records` on the api origin; authentication not required, approval not required)
- Browse Migrate Postgres (`GET /v1/catalog/nodes/intent%3Amigrate-postgres` on the api origin; authentication not required, approval not required)

## Identifiers and status

Recipe `page:migrate:render-postgresql:relational-records`. Revision r1.

release **published** support **verified** execution **unbound**

Formats: [HTML](/content/migrate/render-postgresql/relational-records/index.html) | [Markdown](/content/migrate/render-postgresql/relational-records.md) | [JSON contract](https://api.ample.computer/v1/catalog/recipes/page%3Amigrate%3Arender-postgresql%3Arelational-records)