---
title: "Limits and Quotas - Object Storage"
description: "Exoscale Object Storage limits and quotas, including volume counts, sizes, IOPS, bandwidth, attachment rules, and availability."
url: https://community.exoscale.com/product/storage/object-storage/service-boundaries/limits-and-quotas/
product: "Object Storage"
section: product
last_updated: 2026-09-14
---
> For AI agents: the documentation index is at https://community.exoscale.com/llms.txt. Every page is available as markdown at `<page URL>index.md` or with `Accept: text/markdown`.

# Limits and Quotas - Object Storage

## Limits
The following table shows which limits are applied to SOS compared to AWS.

| Usage | Limit | AWS S3 equivalent |
| -------------------------------------------------------- | ------------------------ | ------------------------ |
| Maximum object size | 4TiB | 5TiB |
| Maximum number of parts in a multipart upload | 10000 | 10000 |
| Minimum part size | 5MiB * | 5MiB * |
| Maximum part size | 5GiB | 5GiB |
| Maximum number of objects in a bucket | unlimited | unlimited |
| Maximum number of versions per object | 1000 | unlimited |
| Minimum billed size | 128kb | 128kb |
| Maximum metadata size | 2kb | 2kb |
| Maximum tags per object | 10 | 10 |
| Maximum tag key size | 128 char | 128 char |
| Maximum tag value size | 256 char | 256 char |
| Maximum bucket name size | 64 char ** | 64 char ** |
| Maximum key name size | 1024 byte (UTF-8) | 1024 byte (UTF-8) |
| Maximum number of objects per delete-objects operation | 1000 | 1000 |

>  *)  does not apply to the 'last part' **)  DNS compatible

### Unsupported S3 Features

  While we strive to maintain full compatibility with the S3 API, we do not support all S3 features.

Currently, the following functionality cannot be used on Exoscale:
- [Object Tagging](https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-tagging.html)
- [Object Annotations](https://docs.aws.amazon.com/AmazonS3/latest/userguide/annotations-overview.html)
- [Object Lifecycle Management](https://docs.aws.amazon.com/AmazonS3/latest/userguide/object-lifecycle-mgmt.html)
- [Bucket Access Logging](https://docs.aws.amazon.com/AmazonS3/latest/userguide/ServerLogs.html)
- [Bucket Event Notification](https://docs.aws.amazon.com/AmazonS3/latest/userguide/NotificationHowTo.html)
- [Static Website Hosting](https://docs.aws.amazon.com/AmazonS3/latest/userguide/WebsiteHosting.html)


## Quotas

| Usage | Limit | AWS S3 equivalent |
| -------------------------------------------------------- | ------------------------ | ------------------------ |
| Maximum number of buckets | 20 | 100 |


## Availability
Object Storage is available in all zones.