Manage Namespace Metadata Catalog for Wildcard Collections

The Atlas Data Federation namespace catalog contains namespace metadata (such as databases, collections, and partitions) for each wildcard (*) collection in each federated database instance store in the federated database instance storage configuration. For commands and queries on wildcard collections, Data Federation returns the data from the catalog or returns an error if the federated database instance store doesn't exist.

When objects that are included in a wildcard collection specification are modified in your S3 bucket, the catalog must be updated for you to see the changes when you run list commands against wildcard collections. By default, the catalog is refreshed every hour for all active federated database instances. In addition, the namespace metadata catalog is refreshed in the background when you:

• Update the storage configuration.

• Run the show collections command.

• Query a collection.

• Run the updateCatalog command.

You can manually update the catalog using the updateCatalog command. You must have the atlasAdmin role to update the catalog.