minio/docs/minio-limits.md

MinIO Server Limits Per Tenant

For optimal production setup MinIO recommends Linux kernel version 4.x and later.

Erasure Code (Multiple Drives / Servers)

Item	Specification
Maximum number of servers per cluster	no-limit
Minimum number of servers	02
Minimum number of drives per server when server count is 1	02
Minimum number of drives per server when server count is 2 or 3	01
Minimum number of drives per server when server count is 4	01
Maximum number of drives per server	no-limit
Read quorum	N/2
Write quorum	N/2+1

Limits of S3 API

Item	Specification
Maximum number of buckets	unlimited (we recommend not beyond 500000 buckets) - see NOTE:
Maximum number of objects per bucket	no-limit
Maximum object size	50 TiB
Minimum object size	0 B
Maximum object size per PUT operation	5 TiB
Maximum number of parts per upload	10,000
Part size range	5 MiB to 5 TiB. Last part can be 0 B to 5 TiB
Maximum number of parts returned per list parts request	10000
Maximum number of objects returned per list objects request	1000
Maximum number of multipart uploads returned per list multipart uploads request	1000
Maximum length for bucket names	63
Maximum length for object names	1024
Maximum length for '/' separated object name segment	255
Maximum number of versions per object	10000 (can be configured to higher values but we do not recommend beyond 10000)

NOTE: While MinIO does not implement an upper boundary on buckets, your cluster's hardware has natural limits that depend on the workload and its scaling patterns. We strongly recommend MinIO SUBNET for architecture and sizing guidance for your production use case.

List of Amazon S3 API's not supported on MinIO

We found the following APIs to be redundant or less useful outside of AWS S3. If you have a different view on any of the APIs we missed, please consider opening a GitHub issue with relevant details on why MinIO must implement them.

List of Amazon S3 Bucket API's not supported on MinIO

• BucketACL (Use bucket policies instead)
• BucketCORS (CORS enabled by default on all buckets for all HTTP verbs, you can optionally restrict the CORS domains)
• BucketWebsite (Use caddy or nginx)
• BucketAnalytics, BucketMetrics, BucketLogging (Use bucket notification APIs)

List of Amazon S3 Object API's not supported on MinIO

• ObjectACL (Use bucket policies instead)

Object name restrictions on MinIO

• Object name restrictions on MinIO are governed by OS and filesystem limitations. For example object names that contain characters ^*|\/&"; are unsupported on Windows platform or any other file systems that do not support filenames with special charaters.

This list is non exhaustive, it depends on the operating system and filesystem under use - please consult your operating system vendor for a more comprehensive list of special characters.

MinIO recommends using Linux operating system for production workloads.

• Objects must not have conflicting objects as parent objects, applications using this behavior should change their behavior and use non-conflicting unique keys, for example situations such as following conflicting key patterns are not supported.

PUT <bucketname>/a/b/1.txt
PUT <bucketname>/a/b

PUT <bucketname>/a/b
PUT <bucketname>/a/b/1.txt