A bucket is a carrier of objects, which can be considered as a "container" for storing objects. You can manage buckets and configure attributes of buckets in various methods such as the Tencent Cloud Console, APIs, and SDKs. For example, you can set a bucket for hosting a static website or set access permission to a bucket. For more information on bucket configuration, see the topics below:
Region is where the COS IDC is located. COS allows users to create buckets in different regions. You can select the region closest to the location where you deploy your business for the buckets so as to reduce latency and cost, and meet the compliance requirements.
For example, if your business is distributed in South China, creating buckets in the Guangzhou region can accelerate object uploads and downloads. For more information on regions, see Regions and Access Domain Names.
It is a must to specify a region when creating a bucket, and the specification is inalterable. All objects in the bucket are stored in the IDC in the region. You cannot set regions on the objects level.
A bucket name consists of two parts: user-defined string and system-generated numeric string (APPID), which are connected by a dash ("-"). For example, in the bucket name
examplebucket-1250000000, examplebucket is the user-defined string, and 1250000000 is the system-generated numeric string (APPID).
In the bucket name examples for APIs and SDKs, the naming format of a bucket is
Naming convention for user-defined strings:
The following are examples of valid bucket names:
A bucket provides two types of permissions by default: public and user.
Public permissions include "Private Read/Write", "Public Read/Private Write", and "Public Read/Write". You can modify bucket access permissions in Permission Management of the bucket in the COS Console. For more information, see Basic Concepts of Access Control.
A root account has all the permissions (full control) for buckets by default. In addition, you can add sub-accounts that are granted permissions to read/write data and Read/Write permissions, and even full access to buckets.