Why Can't I Find the Retrieved File in the Bucket?

Generally, when a client requests a file from an OBS bucket but the file does not exist in the bucket, OBS retrieves the file from the origin server. After storing the file in the bucket, OBS returns the file to the client.

When a client sends a HEAD request to an OBS bucket to obtain the metadata of an object, only the basic information (such as the size, last modification time, and storage class) of the file is returned, rather than the file content. In this case, the back-to-source rule is not triggered, and the file on the origin server is not stored in the bucket.