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This section describes the following cloud objects in Alibaba Cloud:
A cloud metadata object (CMO) is a CloudPools object in Alibaba Cloud that is used for supportability purposes.
A cloud data object (CDO) is a CloudPools object that stores file data in Alibaba Cloud. File data is split into 2 MB chunks to optimize performance before sending it to Alibaba Cloud. The chunk is called a CDO. If file data is less than the chunk size, the CDO size is equal to the size of the file data.
Note: The chunk size is 1 MB in CloudPools 1.0 and versions before OneFS 8.2.0.