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Storage class
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Bucket
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- BOS allows users to customize the total number of buckets under an account, but the maximum number of buckets that can be created under a root account is 100. If you want to adjust the total number of buckets, please submit a work order to contact us;
- There is no default upper limit on the total capacity of Buckets under an account; you can also customize the total account capacity through the BOS Quota Management function;
- There is no upper limit on the capacity of a single bucket;
- BOS bucket names are globally unique. Creators must set a unique name for a new bucket, and the maximum length of a bucket name is 64 bytes;
- A single bucket supports creating a maximum of 1,000 lifecycle rules;
- A single bucket supports creating a maximum of 20 data synchronization rules;
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Object
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- The maximum length of an object name is 1,024 bytes;
- The maximum size of user-defined Meta is 2,048 bytes;
- Support uploading a single file with a maximum size of 48.8 TB (50,000 GB);
- The console supports uploading a single file with a maximum size of 5 GB;
- When uploading files through the multipart method, the minimum part size supported is 100 KB, the maximum part size is 5 GB, and the maximum file size supported is 48.8 TB;
- When uploading files through simple upload methods such as put and append, the maximum size of a single file supported is 5 GB;
- Deleted objects cannot be recovered. It is recommended to confirm before deletion;
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Data transmission
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- BOS sets a public network bandwidth threshold of 10 Gbit/s and an internal network bandwidth threshold of 50 Gbit/s for a single bucket. When a user’s upload or download behavior reaches the bandwidth threshold, the system will give an alarm with the error RequestRateLimitExceeded. This restriction is currently effective for all Regions of BOS. If you have special business needs and want to increase the bandwidth threshold in a short time, please submit a work order to contact us;
- BOS sets a QPS of 1,500 q/s for uploads to a single bucket, no limit on download QPS for a single bucket, 800 q/s for download QPS of a single hot object, and 20 q/s for upload QPS of a single hot object. If you have special business needs and want to increase the threshold in a short time, please submit a work order to contact us;
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Domain name
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- In addition to the official domain name, a single bucket supports users to bind up to 200 custom domain names;
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Image processing
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- Supported original image formats: jpg, png, bmp, webp, heic, gif, avif;
- Supported target formats: jpg, png, bmp, webp, heic, gif, avif;
- The size of the processed file does not exceed 20 MB;
- The width and height of the original image must not exceed 30,000 pixels, and the total pixel count must not exceed 200 million. For dynamic images, the product of the original image's width × height × number of frames must not exceed 200 million pixels. For image watermarks, the total pixel count of the watermark image plus that of the original image must not exceed 200 million.
- In rotation operations, the width or height of the image cannot exceed 4,096 px;
- The width and height of the processed output image do not exceed 9,999 px, including intermediate output images between pipelines and subcommands;
- A maximum of 16 groups of operations, i.e., 16 actions, can be specified;
- The same parameter cannot be repeatedly specified under one action;
- The result of dynamic image processing does not exceed 20 frames;
- Style names can include numbers, letters, and underscores, but the first character cannot be an underscore. The maximum length is 64 characters. A single image can have up to 16 image watermarks.
- A single bucket supports the creation of up to 400 image processing styles;
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Data synchronization
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- For archived objects, data synchronization is not supported temporarily, and archived objects will be ignored during data synchronization. For details, see Set Data Synchronization;
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Data lifecycle management
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- Each bucket can have up to 1,000 rules;
- The effective policy based on file access time records is currently only supported in the Beijing and Suzhou regions;
- Single AZ type files can only be settled to single AZ type files, not to multi-AZ type files; standard storage - multi-AZ type files can only be settled to infrequent access storage - multi-AZ type files;
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Convert file storage class
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- Files uploaded through Append do not support conversion to archive type;
- Archive storage class files can be converted to other storage classes only after restoration is completed;
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