GET Bucket consistency request

Contributors netapp-perveilerk netapp-pcelmer

The GET Bucket consistency request allows you to determine the consistency level being applied to a particular bucket.

The default consistency controls are set to guarantee read-after-write for newly created objects.

You have the s3:GetBucketConsistency permission, or be account root, to complete this operation.

Request example

GET /bucket?x-ntap-sg-consistency HTTP/1.1
Date: date
Authorization: authorization string
Host: host

Response

In the response XML, <Consistency> will return one of the following values:

Consistency control Description

all

All nodes receive the data immediately, or the request will fail.

strong-global

Guarantees read-after-write consistency for all client requests across all sites.

strong-site

Guarantees read-after-write consistency for all client requests within a site.

read-after-new-write

(Default) Provides read-after-write consistency for new objects and eventual consistency for object updates. Offers high availability and data protection guarantees. Most closely matches Amazon S3 consistency guarantees.

Note: If your application uses HEAD requests on objects that do not exist, you might receive a high number of 500 Internal Server errors if one or more Storage Nodes are unavailable. To prevent these errors, set the consistency control to “available” unless you require consistency guarantees similar to Amazon S3.

available (eventual consistency for HEAD operations)

Behaves the same as the “read-after-new-write” consistency level, but only provides eventual consistency for HEAD operations. Offers higher availability for HEAD operations than “read-after-new-write” if Storage Nodes are unavailable. Differs from Amazon S3 consistency guarantees for HEAD operations only.

Response example

HTTP/1.1 200 OK
Date: Fri, 18 Sep 2020 01:02:18 GMT
Connection: CLOSE
Server: StorageGRID/11.5.0
x-amz-request-id: 12345
Content-Length: 127
Content-Type: application/xml

<?xml version="1.0" encoding="UTF-8"?>
<Consistency xmlns="http://s3.storagegrid.com/doc/2015-02-01/">read-after-new-write</Consistency>
Related information

Consistency controls