How is RBD image implemented?

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Hi, everyone.

On the "Block Storage" page, I found this: "Ceph RBD interfaces with the same Ceph object storage system that provides the librados interface and the Ceph FS file system, and it stores block device images as objects.".
Does it mean literally that a RBD image is implemented as an object not a file on Ceph? If this is true, wouldn't it be a problem when creating a very large image?

Thank you:-)


 

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