Object Storage

enum Object Storage is a fully S3-compatible storage service operated in Frankfurt, Germany. It works with any S3 client, SDK, or tool and is a drop-in replacement for AWS S3 with European data sovereignty.

Endpoint

Endpoint	fra.s3.enum.cloud
Protocol	HTTPS
Bucket addressing	Subdomain-style: <bucket>.fra.s3.enum.cloud

Getting started

1. Create a storage user in your project. Access keys are returned immediately:

   enumctl storage users create --display-name my-app

   Caution

   The secret key is only shown once. Save it immediately.

2. Configure your S3 client with the access key, secret key, and the endpoint https://fra.s3.enum.cloud.

See the CLI reference for all available storage commands.

Client configuration

AWS CLI

Add a profile to ~/.aws/config:

[profile enum]
endpoint_url = https://fra.s3.enum.cloud

Set your credentials in ~/.aws/credentials:

[enum]
aws_access_key_id = <your-access-key>
aws_secret_access_key = <your-secret-key>

Then use the profile:

aws s3 ls --profile enum
aws s3 cp file.txt s3://my-bucket/ --profile enum

Alternatively, pass the endpoint per command without a profile:

aws s3 ls --endpoint-url https://fra.s3.enum.cloud

s3cmd

Create ~/.s3cfg or run s3cmd --configure:

host_base = fra.s3.enum.cloud
host_bucket = %(bucket)s.fra.s3.enum.cloud
access_key = <your-access-key>
secret_key = <your-secret-key>
use_https = True

s3cmd ls
s3cmd put file.txt s3://my-bucket/

s5cmd

export S3_ENDPOINT_URL=https://fra.s3.enum.cloud
export AWS_ACCESS_KEY_ID=<your-access-key>
export AWS_SECRET_ACCESS_KEY=<your-secret-key>

s5cmd ls
s5cmd cp file.txt s3://my-bucket/

Quotas and limits

Default quotas are applied to every new project and bucket. These protect the shared cluster from runaway usage while staying compatible with standard S3 client behavior.

Per-project limits

Limit	Default
Storage	10 TiB
Buckets	100

Per-organization limits

Limit	Default
Projects	3

Per-bucket rate limits

Limit	Default
Read ops/s	5,500
Write ops/s	3,500

S3 protocol defaults

These limits follow the S3 standard and are not customized. They apply to all accounts equally.

Limit	Value
Maximum object size	5 TiB
Maximum single PUT size	5 GiB
Multipart upload part size	5 MiB - 5 GiB
Maximum parts per multipart upload	10,000
Object count per bucket	Unlimited

Note

Need higher quotas? Contact support to request a quota increase for your project or organization.

Supported S3 features

• Versioning to protect against accidental overwrites and deletions
• Lifecycle policies to automate object expiration and transition rules
• Server-Side Encryption (SSE) with AES-256 encryption at rest for all objects
• CORS for cross-origin resource sharing rules per bucket
• Object Lock for WORM-compliant immutable storage, compliance, and ransomware protection

Technical specifications

Durability	99.9999999% (9 nines)
Availability SLA	99.9%
Redundancy	Erasure coding across failure domains
Encryption at rest	AES-256
Encryption in transit	TLS
Data location	Frankfurt, Germany