Cloudera Docs

Creating collections for migration

After scanning, group datasets and workloads into collections so you control what migrates in each plan execution.

After scanning the source cluster, use collections to organize the datasets and workloads that need to be migrated. Collections group related items together, allowing you to run phased migrations by selecting which collections to include in a migration plan.

Accessing collections

Collections are managed within a migration plan. Navigate to Plans, open your plan, and click the Collections tab.

The Collections tab shows:

  • Scanned Services panel (left) — lists available data sources (Datasets & Workloads)

  • Data browser (center) — displays scanned items in a navigable tree, filtered by service type

  • Collections sidebar (left, below Scanned Services) — lists all collections with item counts

Figure 1. Cloudera Migration Assistant collections browser

Cloudera Migration Assistant collections browser

Filtering data

Use the service type dropdown to filter the data browser by scan type:

  • HDFS — HDFS directories and files

  • Hive — Hive tables and databases

  • Ozone — Ozone volumes, buckets, and keys

  1. Click the + icon next to Collections in the sidebar.
  2. In the Collection Details drawer, enter a Collection name and select a Color for identification.
    Figure 2. Cloudera Migration Assistant create collection

    Cloudera Migration Assistant create collection
  3. Click Create.

    The new collection appears in the sidebar with 0 items.

  4. Browse the data tree to find the items you want to migrate. Click folder names to navigate deeper into the hierarchy.
  5. Select items using the checkboxes next to each item.
  6. Click the collection icon that appears on the selected item row.
  7. In the Add/Remove Collections popup, check the collections you want to assign the item to.
  8. Click Apply.
    Figure 3. Cloudera Migration Assistant assign to collection

    Cloudera Migration Assistant assign to collection
  9. Click a collection name in the sidebar to view its contents. The data browser switches to show only the items assigned to that collection.
    Figure 4. Cloudera Migration Assistant view collection

    Cloudera Migration Assistant view collection

Collections group scanned datasets for phased migration planning.

You can edit or remove collections from the sidebar. Removing a collection does not affect the source data — only the grouping is deleted.

Create a migration plan to begin migrating the collected datasets. See the migration type guides for specific workflows:

  • Migrating HDFS data to Ozone

  • Migrating Airflow DAGs from Cloudera Data Engineering to a Cloudera Workflow Orchestrator Git repository

  • Migrating Ranger policies