Immutable storage for Azure Blob storage enables users to store business-critical data objects in a WORM ( Write Once, Read Many ) state.
Immutable storage supports:
Time-based retention policy support: Users can set policies to store data for a specified interval.
When a time-based retention policy is set, blobs can be created and read, but not modified or deleted. After the retention period has expired, blobs can be deleted but not overwritten.
References:
https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-immutable-storage
Note:
Immutable storage for Azure Blob storage enables users to store business-critical data objects in a WORM ( write once, read many ) state. This state makes the data non-erasable and non-modifiable for a user-specified interval. For the duration of the retention interval, blobs can be created and read, but cannot be modified or deleted. Immutable storage is available for general-purpose v2 and Blob storage accounts in all azure regions.
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