In Oss, each file of a user is an object, and a single file can support 5TB. object contains key, data, and user meta. The key is an object name, and the user meta is a description of the data
Object naming specification: Use UTF-8 encoding rule length must be between 1-1023 bytes
An object group is a loose collection of one or more object. Users can manipulate object Group like normal object, including Get,range query,delete,list. But the data for object group and the data containing the object are not closely related.
Each object stored on the OSS must be contained in bucket, and the bucket name is globally unique across the OSS and cannot be modified. An application, such as a picture-sharing site, can correspond to one or more bucket. A user can create up to 10 bucket, but the sum of the number and size of object stored in each bucket is unlimited, and the user does not need to consider the scalability of the data.
Bucket naming convention: Can only include lowercase letters, numbers and dashes (-) must be in lowercase letters or numbers at the beginning of the length must be between 3-255 bytes
Service for a user is the virtual storage space that OSS provides to the user. Users can have one or more bucket in this storage space.
Access ID & access key (API key)
When a user registers an OSS, the user is assigned a pair of access IDs and access keys, called ID pairs, that identify the user and authenticate the signature to the OSS.
After you have successfully created an OSS storage service through oss.aliyun.com, you can go to the central administration-get API key to get access ID & access key