In general, the sampling types random, row, and block are supported in IBM Knowledge Catalog. Several conditions define how the sample is composed.

For connected data assets, it is checked whether the connector supports pushdown of sampling to the data source. If the sampling type is supported, sampling happens at the data source.

If the connector does not support any of these sampling types, a default percentage of 80% is used for picking the records to be included in the sample.

Parent topic: Designing metadata enrichment