On OBS, buckets are containers that store objects. OBS provides flat storage methods based on buckets and objects. All objects in a bucket are at the same logical layer, eliminating the traditional multi-layer directory structure of file systems.
On OBS, each bucket name must be globally unique and cannot be changed. When a bucket is created, its access control list (ACL) is generated by default. The ACL records authorized users' permissions such as the read and write permissions. Only authorized users can perform bucket operations, such as creating, deleting, viewing, and setting ACLs for buckets.
An account can create 100 buckets. The number and total size of objects in a bucket are not restricted. Users do not need to worry about system scalability.