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Why Is the Image Size in an OBS Bucket Different from That Displayed in IMS?

Symptom

After a private image is exported to an OBS bucket, the image size in the bucket is different from that displayed in IMS. For example, the size of a private image is 1.04 GB on the IMS console. After it is exported to an OBS bucket, the size is displayed as 2.91 GB.

Figure 1 Example

Cause Analysis

The size of an image in an OBS bucket varies depending on the storage format of the image file in the bucket.