Databricks Data Engineer Associate Question 480
Select 3In Databricks, how do metastores and catalogs differ in terms of their functionality and scope?
- A
A metastore is a top-level storage container for managing metadata, while a catalog acts as a logical grouping of schemas and tables within a metastore.
- B
Metastores are tied to specific cloud storage systems, while catalogs are used to organize datasets logically within a workspace.
- C
Catalogs are directly responsible for storing metadata such as table definitions, while metastores act as an abstraction layer for accessing metadata.
- D
A single metastore can support multiple catalogs, but each catalog is associated with only one metastore.
- E
Catalogs are specific to the Databricks workspace and cannot span multiple workspaces, whereas metastores can be shared across workspaces.
Show answer and explanation
Correct answers: A, D, E
Explanation
Metastores and catalogs serve distinct purposes in Databricks. Metastores are top-level storage abstractions managing all metadata, including catalogs, schemas, and tables, and can be shared across workspaces. Catalogs, in contrast, serve as logical organizational structures within a metastore, grouping schemas and tables, and are confined to a single workspace. Understanding this distinction is crucial for managing data effectively in Databricks.
- A. Correct.
Correct: A metastore is indeed a storage container for metadata, and catalogs provide a way to logically group schemas and tables within that metastore.
- B. Incorrect.
Incorrect: While metastores are tied to cloud storage systems, this statement does not correctly distinguish the functionality of catalogs.
- C. Incorrect.
Incorrect: Catalogs do not store metadata directly; they provide an organizational structure over the metadata managed by the metastore.
- D. Correct.
Correct: A metastore can support multiple catalogs, providing flexibility to organize and manage datasets. Each catalog, however, is tied to one specific metastore.
- E. Correct.
Correct: Metastores can span multiple workspaces, enabling data sharing, while catalogs are workspace-specific and cannot cross workspace boundaries.