S3 supported APIs and limitations

This page describes limitations concerning the S3 service and protocol implementation.

Supported S3 APIs

The following standard S3 APIs are supported:

• Bucket (HEAD/GET/PUT/DEL) Including ListObjects and ListObjectsV2

• Bucket Lifecycle (GET/PUT/DEL)

• Bucket Policy (GET/PUT/DEL)

• Bucket Tagging (GET/PUT/DEL)

• Object (GET/PUT/DEL)

• Object Tagging (GET/PUT/DEL)

• Object Multipart (POST Create/Complete, GET/DEL/PUT, GET Parts)

For a multipart object upload, the bucket’s free capacity must be at least twice the size of the object until the upload is complete.

General limits

Item	Limits
Maximum number of buckets	10000
Maximum object size	5 TiB
Maximum number of parts per upload	10000
Part numbers	1 to 10000 (inclusive)
Part size	5 MiB to 5 GiB. The last part can be < 5 MiB
Maximum number of parts returned for a list parts request	1000
Maximum number of multipart uploads returned in a list multipart uploads request	1000
User-defined metadata per object	2 KB
Maximum length of an S3 IAM user policy	2048
Maximum number of S3 IAM user policies	1024
Maximum number of S3 regular users	1024
Maximum number of S3 service accounts	5000
Maximum number of S3 STS credentials	5000

Naming considerations

Buckets

• Bucket names must be between 3 and 63 characters long.

• Bucket names can consist only of lowercase letters, numbers, dots (.), and hyphens (-).

• Bucket names must begin and end with a letter or number.

• Bucket names must not be formatted as IP addresses (for example, 192.168.5.4).

• Bucket names must be unique across the cluster.

Objects

• Object key names must be up to 1024 characters long.

• The prefix / of an object is interpreted as a directory, and such directory segments are limited to 255 characters.

• See AWS S3 object name limitations. Match them to limitations in other protocols.

Note: It is recommended to avoid special characters that might be unsupported using protocols other than S3.

Supported S3 policy actions

The S3 protocol implementation supports the following policy actions:

• s3:* Note: this wildcard is supported for IAM policies but not for bucket policies

• s3:AbortMultipartUpload

• s3:CreateBucket

• s3:DeleteBucket

• s3:DeleteBucketPolicy

• s3:DeleteObject

• s3:GetBucketLocation

• s3:GetLifecycleConfiguration

• s3:PutLifecycleConfiguration

• s3:ListBucketMultipartUploads

• s3:ListMultipartUploadParts

• s3:GetBucketPolicy

• s3:GetObject

• s3:ListAllMyBuckets

• s3:ListBucket

• s3:PutBucketPolicy

• s3:PutObject

• s3:GetBucketTagging

• s3:PutBucketTagging

Lifecycle configuration

WEKA supports the AWS S3 Lifecycle Configuration elements and definitions, with the limitation of only supporting the lifecycle Expiration action.