System Design: A Blob Store

Blob store is a storage solution for unstructured data. We can store photos, audio, videos, binary executable codes, or other multimedia items in a blob store. Every type of data is stored as a blobA blob (binary large object) consists of a collection of binary data stored as a single unit.. It follows a flat data organization pattern where there are no hierarchies, that is, directories, sub-directories, and so on.

Mostly, it’s used by applications with a particular business requirement called write once, read many (WORM), which states that data can only be written once and that no one can change it. Just like in Microsoft Azure, the blobs are created once and read many times. Additionally, these blobs can’t be deleted until a specified interval, and they also can’t be modified to protect critical data.