diff --git a/.github/fork_workflows/fork_pr_integration_tests_aws.yml b/.github/fork_workflows/fork_pr_integration_tests_aws.yml
@@ -33,21 +33,21 @@ jobs:
        id: image-tag
        run: echo "::set-output name=DOCKER_IMAGE_TAG::`git rev-parse HEAD`"
      - name: Cache Public ECR Image
-        id: lambda_python_3_9
        uses: actions/cache@v2
        with:
          path: ~/cache
-          key: lambda_python_3_9
      - name: Handle Cache Miss (pull public ECR image & save it to tar file)
        if: steps.cache-primes.outputs.cache-hit != 'true'
        run: |
          mkdir -p ~/cache
-          docker pull public.ecr.aws/lambda/python:3.9
-          docker save public.ecr.aws/lambda/python:3.9 -o ~/cache/lambda_python_3_9.tar
      - name: Handle Cache Hit (load docker image from tar file)
        if: steps.cache-primes.outputs.cache-hit == 'true'
        run: |
-          docker load -i ~/cache/lambda_python_3_9.tar
      - name: Build and push
        env:
          ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
@@ -67,7 +67,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.9" ]
        os: [ ubuntu-latest ]
    env:
      OS: ${{ matrix.os }}

diff --git a/.github/fork_workflows/fork_pr_integration_tests_gcp.yml b/.github/fork_workflows/fork_pr_integration_tests_gcp.yml
@@ -9,7 +9,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.9" ]
        os: [ ubuntu-latest ]
    env:
      OS: ${{ matrix.os }}

diff --git a/.github/fork_workflows/fork_pr_integration_tests_snowflake.yml b/.github/fork_workflows/fork_pr_integration_tests_snowflake.yml
@@ -9,7 +9,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.9" ]
        os: [ ubuntu-latest ]
    env:
      OS: ${{ matrix.os }}

diff --git a/.github/workflows/build_wheels.yml b/.github/workflows/build_wheels.yml
@@ -59,7 +59,7 @@ jobs:
      - name: Setup Python
        uses: actions/setup-python@v3
        with:
-          python-version: "3.9"
          architecture: x64
      - name: Setup Node
        uses: actions/setup-node@v3
@@ -86,7 +86,7 @@ jobs:
        id: setup-python
        uses: actions/setup-python@v3
        with:
-          python-version: "3.10"
          architecture: x64
      - name: Setup Node
        uses: actions/setup-node@v3
@@ -137,7 +137,7 @@ jobs:
    strategy:
      matrix:
        os: [ubuntu-latest,  macos-13 ]
-        python-version: ["3.9", "3.10"]
        from-source: [ True, False ]
    env:
      # this script is for testing servers

diff --git a/.github/workflows/java_pr.yml b/.github/workflows/java_pr.yml
@@ -88,7 +88,7 @@ jobs:
        uses: actions/setup-python@v3
        id: setup-python
        with:
-          python-version: "3.9"
          architecture: x64
      - name: Authenticate to Google Cloud
        uses: 'google-github-actions/auth@v1'
@@ -111,7 +111,7 @@ jobs:
    runs-on: ubuntu-latest
    needs: unit-test-java
    env:
-      PYTHON: 3.9
    steps:
      - uses: actions/checkout@v4
        with:
@@ -128,7 +128,7 @@ jobs:
          architecture: x64
      - uses: actions/setup-python@v3
        with:
-          python-version: '3.9'
          architecture: 'x64'
      - uses: actions/cache@v2
        with:
@@ -158,7 +158,7 @@ jobs:
        uses: actions/setup-python@v3
        id: setup-python
        with:
-          python-version: 3.9
          architecture: x64
      - name: Get pip cache dir
        id: pip-cache

diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
@@ -6,14 +6,14 @@ jobs:
  lint-python:
    runs-on: [ubuntu-latest]
    env:
-      PYTHON: 3.9
    steps:
      - uses: actions/checkout@v4
      - name: Setup Python
        id: setup-python
        uses: actions/setup-python@v5
        with:
-          python-version: "3.9"
          architecture: x64
      - name: Upgrade pip version
        run: |

diff --git a/.github/workflows/pr_integration_tests.yml b/.github/workflows/pr_integration_tests.yml
@@ -47,21 +47,21 @@ jobs:
        id: image-tag
        run: echo "::set-output name=DOCKER_IMAGE_TAG::`git rev-parse HEAD`"
      - name: Cache Public ECR Image
-        id: lambda_python_3_9
        uses: actions/cache@v2
        with:
          path: ~/cache
-          key: lambda_python_3_9
      - name: Handle Cache Miss (pull public ECR image & save it to tar file)
        if: steps.cache-primes.outputs.cache-hit != 'true'
        run: |
          mkdir -p ~/cache
-          docker pull public.ecr.aws/lambda/python:3.9
-          docker save public.ecr.aws/lambda/python:3.9 -o ~/cache/lambda_python_3_9.tar
      - name: Handle Cache Hit (load docker image from tar file)
        if: steps.cache-primes.outputs.cache-hit == 'true'
        run: |
-          docker load -i ~/cache/lambda_python_3_9.tar
      - name: Build and push
        env:
          ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
@@ -86,7 +86,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.10" ]
        os: [ ubuntu-latest ]
    env:
      OS: ${{ matrix.os }}

diff --git a/.github/workflows/pr_local_integration_tests.yml b/.github/workflows/pr_local_integration_tests.yml
@@ -19,7 +19,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.10" ]
        os: [ ubuntu-latest ]
    env:
      OS: ${{ matrix.os }}

diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
@@ -160,7 +160,7 @@ jobs:
          architecture: x64
      - uses: actions/setup-python@v3
        with:
-          python-version: '3.9'
          architecture: 'x64'
      - uses: actions/cache@v2
        with:

diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
@@ -7,7 +7,7 @@ jobs:
    strategy:
      fail-fast: false
      matrix:
-        python-version: [ "3.9", "3.10" ]
        os: [ ubuntu-latest, macos-13 ]
        exclude:
          - os: macos-13

@@ -106,8 +106,7 @@
  * [Google Cloud Platform](reference/providers/google-cloud-platform.md)
  * [Amazon Web Services](reference/providers/amazon-web-services.md)
  * [Azure](reference/providers/azure.md)
-* [Batch Materialization Engines](reference/batch-materialization/README.md)
-  * [Bytewax](reference/batch-materialization/bytewax.md)
  * [Snowflake](reference/batch-materialization/snowflake.md)
  * [AWS Lambda (alpha)](reference/batch-materialization/lambda.md)
  * [Spark (contrib)](reference/batch-materialization/spark.md)

@@ -57,28 +57,9 @@ To keep your online store up to date, you need to run a job that loads feature d
Out of the box, Feast's materialization process uses an in-process materialization engine. This engine loads all the data being materialized into memory from the offline store, and writes it into the online store. 

This approach may not scale to large amounts of data, which users of Feast may be dealing with in production.
-In this case, we recommend using one of the more [scalable materialization engines](./scaling-feast.md#scaling-materialization), such as the [Bytewax Materialization Engine](../reference/batch-materialization/bytewax.md), or the [Snowflake Materialization Engine](../reference/batch-materialization/snowflake.md).
Users may also need to [write a custom materialization engine](../how-to-guides/customizing-feast/creating-a-custom-materialization-engine.md) to work on their existing infrastructure.  

-The Bytewax materialization engine can run materialization on an existing Kubernetes cluster. An example configuration of this in a `feature_store.yaml` is as follows:
-
-```yaml
-batch_engine:
-  type: bytewax
-  namespace: bytewax
-  image: bytewax/bytewax-feast:latest
-  env:
-    - name: AWS_ACCESS_KEY_ID
-      valueFrom:
-        secretKeyRef:
-          name: aws-credentials
-          key: aws-access-key-id
-    - name: AWS_SECRET_ACCESS_KEY
-      valueFrom:
-        secretKeyRef:
-          name: aws-credentials
-          key: aws-secret-access-key
-```

### 2.2 Scheduled materialization with Airflow