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Microsoft Certified: Azure Solutions Architect Expert · Microsoft
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Blob Storage supports immutable storage and disabling anonymous access, but fine-grained POSIX ACLs are specifically provided by ADLS Gen2 (hierarchical namespace enabled)
In the context of storing data assets in an Azure Storage account, the need is to ensure that data is immutable, anonymous access is disabled, and that Azure AD-based access control is supported. The recommended solution to meet these requirements is Azure Blob Storage. This service lets you configure immutable storage policies, enforce security with mandatory authentication, and apply granular permissions using Azure AD ACLs. Alternatives such as Azure Files, Azure Data Lake Storage and Azure NetApp Files were considered, but they do not offer immutable access for example.
While Azure Blob Storage also meets these requirements, ADLS Gen2 is specifically designed for big data analytics, providing additional capabilities such as hierarchical namespace and optimized performance for large datasets.