Can we able to create directory in Azure blob container in ADLS?

Question

I know we can create directory in blob container in ADLS and also in filesystem. But what is the difference between directory in container and filesystem in ADLS?

Answer 1

Hello @Akash S ,

Thanks for the question and using MS Q&A platform.

• Blob: Flat namespace object store.
• ADLS Gen2: Hierarchical namespaces (much like a File System).

Flat namespace (FNS): A mode of organization in a storage account on Azure where objects are organized using a flat structure - aka a flat list of objects. This is the default configuration for a storage account.

Hierarchical namespace (HNS): With hierarchical namespaces, you can organize data into structured folders and directories. A hierarchical namespace allows operations like folder renames and deletes to be performed in a single atomic operation, which with a flat namespace requires a number of operations proportionate to the number of objects in the structure. Hierarchical namespaces store additional meta-data for your directory and folder structure, and allows Filesystem ACLs. However, as your data volume grows, hierarchical namespaces keeps your data organized and more importantly yields better storage performance on your analytic jobs – thus lowering your overall TCO to run analytic jobs.

Hope this will help. Please let us know if any further queries.

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