@webiny/data-transfer

A data-transfer tool for Webiny environments. Copies DynamoDB, S3, and OpenSearch records between AWS accounts with optional transformer chains.

Use cases

• v5 to v6 migration — built-in presets handle the full migration pipeline.
• Prod to dev seeding — zero transformers, just copy data as-is.
• Custom transfers — author your own transformers, pipelines, and presets.

Getting started

npx --yes --loglevel=silent @webiny/data-transfer my-transfer
cd my-transfer

This scaffolds a new project with a config.ts, example preset, and everything wired up. The wizard walks you through credentials, preset selection, and transfer execution:

yarn transfer

Manual setup

If you prefer to set up manually:

yarn add @webiny/data-transfer

Then create a config.ts:

import { createConfig, fromAwsProfile, loadEnv } from "@webiny/data-transfer";

loadEnv(import.meta.url);

export default createConfig({
  source: {
    dynamodb: { table: "Source-Table", region: "us-east-1" },
    credentials: fromAwsProfile("source-profile")
  },
  target: {
    dynamodb: { table: "Target-Table", region: "eu-central-1" },
    credentials: fromAwsProfile("target-profile")
  },
  pipeline: {
    preset: "copy-ddb"
  }
});

Run it:

yarn webiny-data-transfer --config=./config.ts --preset=copy-ddb

Upgrading

yarn up @webiny/data-transfer

The scaffolded project depends on @webiny/data-transfer via a caret range, so minor and patch updates are picked up automatically.

Built-in presets

Preset	Description
v5-to-v6-ddb	Full Webiny v5 to v6 migration of the primary DynamoDB table
v5-to-v6-os	Migration of the OpenSearch companion DynamoDB table (run after v5-to-v6-ddb)
copy-ddb	Verbatim DynamoDB + S3 copy (no transformations)
copy-os	Verbatim OpenSearch companion table copy (no transformations)
copy-files	S3-only file copy

Custom presets placed in your project's presets/ directory are listed alongside built-ins.

Documentation

• Config reference — config.ts setup, env helpers, credentials, IAM permissions, tuning, debug options
• Commands — guided wizard, direct --config runs, init, init-project, --segments
• Writing presets — preset shape, pipeline builder, filters, multi-pipeline patterns
• Writing transformers — transformer factories, context types, processor slices, built-ins
• Extending built-in presets — PipelineCustomizer, setup.ts, custom DI
• Pipeline runtime — merge groups, first-match-wins, unmatched records, hooks
• Troubleshooting — common issues and fixes

Development

git clone git@github.com:webiny/data-transfer.git
cd data-transfer
yarn install
yarn full    # format, lint, typecheck, test, coverage
yarn build   # compile to dist/

License

MIT