DataWorks:Common issues

Question categories

• Data Map

  • Why is there a large difference between the storage amount on the Data Map overview page and the storage trend chart?

  • Why can't I find a new table in Data Map?

  • How do I notify downstream dependencies about business logic changes to a table?

  • Which types of Hive tables support data preview in Data Map?

• Data Security Guard

  • Why are queries sometimes desensitized and sometimes not in Data Security Guard?

Why is there a large difference between the storage amount on the Data Map overview page and the storage trend chart?

The storage amount is a real-time value, while the storage trend chart displays a snapshot from a specific point in time. A difference between the two is expected when your current computing workload is low and generates few temporary tables.

Why can't I find a new table in Data Map?

If the table status in Data Map is inconsistent with its actual status, use the manual sync feature in Data Map to synchronize the latest table status. This applies to the following cases:

• The table schema is not updated in Data Map.

• A new table cannot be found in Data Map.

• A new table cannot be found in data integration.

How do I notify downstream dependencies about business logic changes to a table?

Impact Analysis shows which downstream tables depend on your table and who owns them. On the Data Map Table Details page, go to Lineage Information > Impact Analysis to send batch email notifications to the owners of relevant downstream dependencies.

Which types of Hive tables support data preview in Data Map?

Data preview is supported only for specific types of Hive tables in E-MapReduce (EMR). If you cannot preview data from a Hive table, contact the cluster administrator to confirm that the cluster type and storage class meet the following requirements.

Why are queries sometimes desensitized and sometimes not in Data Security Guard?

Desensitization is applied only when at least 80% of the data matches the specified rule.