S3 limitations

We recommend uploading objects larger than 1 GB using segmented upload via the S3 API or Swift API.

Storage limits and bucket limits are configured by you.

S3 entity limitations

Buckets
Objects
Headers

Maximum number of buckets in a project	2,000 `*`
Maximum number of buckets with Virtual-Hosted addressing in a project	100 `**` (within 2,000)
Maximum bucket name length	128 UTF-8 characters
Maximum Bucket Policy size	20 KB
Maximum number of objects in a bucket	Unlimited

* The control panel displays the first 1,000 buckets. If there are more buckets, you can view the full list via the API.

** Can be increased upon request.

Maximum object size	50 TB
Maximum object name length	1024 UTF-8 characters
Minimum data size for a single upload request	0 bytes
Maximum data size for a single upload request	5 GB
Minimum part size for multi-part upload	1 byte
Maximum number of parts for multi-part upload	10 000

Maximum size of all headers/metadata per account/bucket/object in the request body	8 KB
Maximum size of all headers/metadata of type `X-Account-Meta-$Name`, `X-Container-Meta-$Name`, `X-Object-Meta-$Name`	4 KB
Maximum number of headers per account, bucket, or object	90
Maximum header name length	64 UTF-8 characters
Maximum number of characters in a header value	256 UTF-8 characters
Maximum total header size	320 UTF-8 characters (64 characters + 256 characters)

API request limitations

The limits are specified for a single bucket. If your load profile exceeds these limits, we recommend distributing the load across multiple buckets at a rate of no more than 250 requests per second (RPS) per bucket.

If the limit is exceeded, the server returns a response with the code 429 Too Many Requests and the message Rate Limit exceeded.

S3 API
Swift API

Request type	Limit (requests per second)	Server message
All requests	2 000	Too many authorized requests
GET + HEAD	1 000	Too many GET requests
POST	200	Too many POST requests
PUT	300	Too many PUT requests
DELETE	300	Too many DELETE requests