Why is the value of the Storage parameter quite different from the statistics shown in the storage trend chart on the Overview page of Data Map?

The value of the Storage parameter is updated in real time, while the storage trend chart displays the storage statistics at specific points in time. If a small number of temporary tables are generated after a specific point in time, the statistics at the specific point in time in the storage trend chart may be inconsistent with the value of the Storage parameter.

Why does Data Map not display the real-time lineage information?

The lineage information is updated with a latency of at least one day.

What do I do if no search results are returned when I search for a new table in Data Map?

You can use the manual synchronization feature in Data Map if the new table cannot be found in Data Map or the data of the table is inconsistent with that in Data Map. Manual synchronization is required in the following scenarios:

  • The schema changes of the tables in the Workspace Tables pane are not updated to Data Map.
  • No search results are returned when you search for a new table in Data Map.
  • No search results are returned when you search for a new table in Data Integration.
Data Map

How do I notify the owners of descendant nodes of the changes to the business logic?

On the Data Map page, find and click the table that you want to view. On the table details page that appears, choose Lineage > Impact Analysis. Then, perform operations as shown in the following figure to inform multiple owners by sending email notifications. Send email notifications

Which types of Hive tables can be previewed in Data Map?

Only data of Hive tables in E-MapReduce (EMR) can be previewed in Data Map. If you cannot preview data of a Hive table, you can contact the cluster administrator to check whether the cluster type and the storage type meet the requirements that are described in the following table.
Note The Supported icon indicates that the data preview feature is supported, and the Not supported icon indicates that the data preview feature is not supported.
EMR cluster type Metadata storage type Data storage type: OSS Data storage type: OSS-HDFS Data storage type: HDFS
DataLake clusters Data Lake Formation (DLF) Supported Supported Not supported
RDS instance Supported Supported Supported
MySQL Supported Supported Supported
Custom clusters DLF Supported Supported Not supported
RDS instance Supported Supported Supported
MySQL Supported Supported Supported
Other clusters -- Not supported

Why does the de-identification feature fail to take effect for the query results sometimes after I configure de-identification rules in Data Security Guard?

The de-identification feature works only if 80% of the records that are queried match the de-identification rules.