Specifications and Limits

Last updated: 2019-11-22 16:47:51

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Category Specifications and Limits Description
QPS Limits 30000 QPS per root account. For higher QPS, see Request Rate and Performance Optimization
Bandwidth Limit COS does not limit upload and download bandwidth, and the speed of the upload and download depends on your local bandwidth.
Storage Class COS Standard Billing limits:
There is no limit imposed on the storage time and storage size.
For more information on COS standard billing, see Product Pricing
COS Infrequent Access Billing limits:
Storage time less than 30 days is calculated by 30 days.
Storage size less than 64 KB is calculated by 64 KB.
For more information on COS Infrequent Access billing, see Product Pricing
Archive Storage Billing limits:
Storage time less than 90 days is calculated by 90 days.
Storage size less than 64 KB is calculated by 64 KB.
For more information on Archive Storage billing, see Product Pricing
Bucket Limits 1. When the bucket has been created, the name and region cannot be modified.
2. The names of all buckets under the same user account are unique and cannot be changed.
3. The name only supports lowercase letters, numbers [a-z, 0-9], dashes (-) and the combination of them with a length of 1-50 characters.
Number of buckets A maximum of 200 (default) buckets per root account
Number of objects For each bucket, the number of objects is not limited.
Object Limits Object key length should be between 1 byte and 850 bytes. For more information, see Object Overview
Upload 1. The maximum size of an object to be uploaded from the console is 512 GB.
2. The maximum size of a single object to be uploaded via API/SDK is 48.82 TB (50,000 GB).
Upload API specifications:
  a) Simple upload: 5 GB at most, For more information, see Simple Upload
  b) Multipart upload: 48.82 TB maximum for a single object. The part size is 1 MB to 5GB. The size of the last part can be less than 1 MB, and the number of parts is 1 to 10,000, For more information, see Multipart Upload
Copy 1. Regional/Cross-region object copy is supported.
2. Object copy in the same region is free of charge. Cross-region object copy incurs traffic charges. For more information, see Traffic Cost in Product Pricing.
3. Copy API specifications:
  a) Simple copy: 5 GB at most, For more information, see Simple Copy
  b) For size of more than 5 GB, multipart copy must be applied. The maximum size of an object to be copied is 48.82 TB, For more information, see Multipart Copy
Batch Deletion Up to 1,000 objects can be deleted in batch via API/SDK.
Access Policy Number of Rules The sum of policies associated with the ACLs, Policies and CAMs of buckets and objects is limited to 1,000 per each root account (with the same APPID).
Lifecycle Number of Rules Up to 1,000 rules can be created for a bucket.
Storage class transition COS Standard to COS Infrequent Access: 1 day at least
COS Standard/COS Infrequent Access to Archive Storage: 1 day at least
Expired Object Deletion Expired object deletion for COS Standard/COS Infrequent Access/Archive Storage: 1 day at least
SDK Type 12 types:
Andriod, C, C++, .NET, Go, iOS, Java, JavaScript, Node.js, PHP, Python, Mini Program SDK