Understanding the process to display sample data

If you open a Column, Table or Data Set asset page, Collibra performs a series of checks to determine if sample data is displayed.

Note 

Currently, you can only request sample data via Edge for Table and Column assets.

Check or Action Description Positive outcome Negative outcome
1 Collibra checks if you have the required permissions to view sample data.

You have the required permissions:

  • The process continues with the next check.

You don't have the required permissions:

  • You cannot see the sample data and a message appears on the page.
  • The process stops.
2

Collibra checks if sample data is stored in the Collibra cloud repository.

Tip 

This is only possible if:

  • Sample data was extracted during the registration of the data source via Jobserver.
  • Sample data was uploaded by using the Catalog REST API - Profiling.

Sample data is available in the Collibra cloud repository:

  • The sample data is visible in the page.
  • The process stops.

No sample data is available in the Collibra cloud repository:

  • The process continues with the next check.
3

Collibra checks if the asset is connected to an Edge site.

Tip An asset can be connected to an Edge site via its related Database asset.

The asset is connected to an Edge site:

  • The process continues with the next check.

No sample data is available for the asset:

  • You cannot see the sample data.
  • The process stops.
4 Collibra checks if sample data is available in the cache of Edge.
This is possible if sample data has been requested before and the cache has not been cleared in the meantime.
Once a day, Edge deletes all data that is older than 24 hours from its cache.

Sample data is available in the cache:

  • The sample data is visible in the page.

    Note It can take some time for the sample data to be displayed.

  • The process stops.

No sample data is available in the cache:

  • The process continues with the next check.
5 Collibra checks if a sample data request is pending for the data source.

A sample data request is pending for the data source:

  • You need to wait until the sample data has been collected and cached in the Edge site.
  • The process stops.

No sample data request is pending for the data source:

  • The button Request Sample Data appears on the page and in the Action drop-down list.
  • The process stops until you click the button.
6 You click the Request Sample Data button.
  • A 'Request sample data' job is launched and added to the Activities list.
  • When Edge is available, the job starts. Sample data is collected and temporarily made available in the cache of the Edge site. If you request sample data for a column, sample data is collected and cached for the entire table. Every day, Edge deletes all data that is older than 24 hours from its cache. This means the sample data remains available between 24 and 48 hours.
  • While the job is pending, you can navigate away from the page.
  • Once the job is completed, you receive a notification and the process stops.