Materialize/doc/user/content/manage/dbt/slim-deployments.md

---

title: "Slim deployments" description: "How to use dbt for slim deployments." menu: main:

parent: manage-dbt
weight: 40

---

{{< tip >}} Once your dbt project is ready to move out of development, or as soon as you start managing multiple users and deployment environments, we recommend checking the code in to version control and setting up an automated workflow to control the deployment of changes. {{</ tip >}}

On each run, dbt generates artifacts with metadata about your dbt project, including the manifest file (manifest.json). This file contains a complete representation of the latest state of your project, and you can use it to avoid re-deploying resources that didn't change since the last run.

We recommend using the slim deployment pattern when you want to reduce development idle time and CI costs in development environments. For production deployments, you should prefer the blue/green deployment pattern.

{{< note >}} Check this demo for a sample end-to-end workflow using GitHub and GitHub Actions. {{</ note >}}

1. Fetch the production manifest.json file into the CI environment:

         - name: Download production manifest from s3
           env:
             AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
             AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
             AWS_SESSION_TOKEN: ${{ secrets.AWS_SESSION_TOKEN }}
             AWS_REGION: us-east-1
           run: |
             aws s3 cp s3://mz-test-dbt/manifest.json ./manifest.json
   

2. Then, instruct dbt to run and test changed models and dependencies only:

         - name: Build dbt
           env:
             MZ_HOST: ${{ secrets.MZ_HOST }}
             MZ_USER: ${{ secrets.MZ_USER }}
             MZ_PASSWORD: ${{ secrets.MZ_PASSWORD }}
             CI_TAG: "${{ format('{0}_{1}', 'gh_ci', github.event.number ) }}"
           run: |
             source .venv/bin/activate
             dbt run-operation drop_environment
             dbt build --profiles-dir ./ --select state:modified+ --state ./ --target production
   

   In the example above, --select state:modified+ instructs dbt to run all models that were modified (state:modified) and their downstream dependencies (+). Depending on your deployment requirements, you might want to use a different combination of state selectors, or go a step further and use the --defer flag to reduce even more the number of models that need to be rebuilt. For a full rundown of the available state modifier and graph operator options, check the dbt documentation.

3. Every time you deploy to production, upload the new manifest.json file to blob storage (e.g. s3):

         - name: upload new manifest to s3
           env:
             AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
             AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
             AWS_SESSION_TOKEN: ${{ secrets.AWS_SESSION_TOKEN }}
             AWS_REGION: us-east-1
           run: |
             aws s3 cp ./target/manifest.json s3://mz-test-dbt