Partitions and backfills in the Dagster UI

Now that you've created your partitions, used those partitions in the assets, and updated the jobs with partitions to create a partitioned schedule, let’s check out how things look in the Dagster UI. If you still have dagster dev running, you’ll need to Reload definitions to ensure the partitions are visible.

Viewing and materializing assets with partitions

Step one
Navigate to Assets, then Asset lineage. As you’ll see in the asset graph, the `taxi_trips` assets now have partition information.

Step two

Step two
Taking a closer look at the `taxi_trips_file` asset, there are three partitions that represent the three months that were included in the partition. ⚫ 0 - represents that 0 partitions have been successfully materialization O All represents all (three) partitions haven't yet been materialized ⚠️ 0 represents that there are zero failed partitions This information is useful to get a quick look at the state of your asset.

Taking a closer look at the taxi_trips_file asset, there are three partitions that represent the three months that were included in the partition.

⚫ 0 - represents that 0 partitions have been successfully materialization
O All represents all (three) partitions haven't yet been materialized
⚠️ 0 represents that there are zero failed partitions

This information is useful to get a quick look at the state of your asset.

The taxi_trips_file asset with new partitions

Step three
Clicking Materialize all will display a popup containing the partition information. This allows you to choose which partitions you want to materialize or launch a backfill that can materialize several partitions at once.

Step three

Clicking Materialize all will display a popup containing the partition information.

This allows you to choose which partitions you want to materialize or launch a backfill that can materialize several partitions at once.

A popup displaying an asset's partition information in the Dagster UI

Launching a backfill

Step one
To begin the backfill, click Launch backfill in the popup window from the last section. By default, the date range will be the entire date range. Next, click Overview > Backfills to view the backfill’s information.

Step one

To begin the backfill, click Launch backfill in the popup window from the last section. By default, the date range will be the entire date range.

Next, click Overview > Backfills to view the backfill’s information.

The Backfills tab in the Dagster UI

Step two
Click on a backfill to open its details page. In this page, you’ll see each asset being materialized in the backfill, along with their status.

Step three
Navigate back to the Global Asset Lineage page (Assets > Asset lineage). In the asset graph, you’ll see the status of the partitioned and non-partitioned assets has been updated.

Step three

Navigate back to the Global Asset Lineage page (Assets > Asset lineage).

In the asset graph, you’ll see the status of the partitioned and non-partitioned assets has been updated.

The Global Asset Lineage page with updated asset information after a backfill

Viewing asset partition details

Step one
In the asset graph, click the `taxi_trips` asset and view in the Asset Catalog. Each month is listed as a partition that can be examined.

Step two
Select 2023-03-01 to view a specific partition. Here you can see information specific to that partition of the asset, including lineage to the source data. In this case, that’s `taxi_trips_file`.