Specifications and Limits

Last updated: 2020-09-10 18:31:36
Category Specifications and Limits Description
QPS Limits 1. READ/WRITE requests: by default, each bucket enjoys up to 30,000 QPS in Public Cloud regions in Chinese mainland, and up to 3,000 QPS in any other regions.
2. LIST requests: by default, each bucket enjoys up to 1,200 QPS in any region.
3. RETRIEVE requests: each bucket enjoys up to 100 QPS in any region.
To request higher QPS, please see Request Rate and Performance Optimization.
Bandwidth Limits By default, the bandwidth limit is 15 Gbit/s for each Public Cloud region in Chinese mainland, and 10 Gbit/s for any other regions. If this threshold is exceeded, traffic throttling will be triggered for requests. To increase this limit, please submit a ticket.
Storage class STANDARD limits Billing limits:
there is no limit imposed on storage duration or storage size.
For more information on COS STANDARD billing, see Product Pricing.
STANDARD_IA limits Billing limits:
a storage duration of less than 30 days is calculated based on 30 days.
A storage size of less than 64 KB is calculated based on 64 KB.
For more information on COS STANDARD_IA billing, see Product Pricing.
ARCHIVE limits Billing limits:
a storage duration of less than 90 days is calculated based on 90 days.
A storage size of less than 64 KB is calculated based on 64 KB.
For more information on COS Archive Storage billing, see Product Pricing.
Bucket Limits 1. Once a bucket is created, its name and region cannot be modified.
2. The name of each bucket under a given account is unique and cannot be changed.
3. The name contains 1-50 characters that can only be English lowercase letters [a-z], numbers [0-9], or a combination of them with underscores "-".
Number of buckets A maximum of 200 (default) buckets is allowed per root account
Number of objects For each bucket, there is no limit on the number of objects.
Object Limits An object key 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 via 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 at most for a single object. The part size can range from 1 MB to 5 GB, and the size of the last part can be less than 1 MB. The number of parts can range from 1 to 10,000. For more information, see Multipart Upload.
Replication 1. You can perform intra-region or cross-region object replication with a Tencent Cloud account.
2. Intra-region object replication is free of charge while cross-region object replication incurs traffic fees. For more information, see traffic fees in Product Pricing.
3. Replication API specifications:
  (a) Simple replication: 5 GB maximum for a single object. For more information, see Simple Copy
  (b) Multipart replication is required for an object larger than 5 GB, allowing a maximum size of 48.82 TB for a single object. For more information, see Multipart Copy
Batch Deletion Up to 1,000 objects can be deleted in a batch operation via API/SDK.
Access policy Number of polices Each root account (APPID) can configure up to 1,000 bucket ACLs
Lifecycle Number of rules Each bucket can have up to 1,000 lifecycle rules
Storage Class Transition STANDARD to STANDARD_IA: 1 day at least
STANDARD/STANDARD_IA to ARCHIVE: 1 day at least
Expired Object Deletion Expired object deletion for COS STANDARD/STANDARD_IA/ARCHIVE Storage: 1 day at least
SDK Types 12 types:
Android, C, C++, .NET, Go, iOS, Java, JavaScript, Node.js, PHP, Python, Wechat Mini Program

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