# Creating a Bucket

#### Functions

This operation is used to create a bucket with a specified name.

- By default, a user can have a maximum of 100 buckets.
- The name of a deleted bucket can be reused for a bucket at least 30 minutes after the deletion.

A bucket name must be unique in OBS. If a user creates a bucket with the same name as that of an existing bucket under the same account and in the same region, a 200 code (indicating success) is returned. In scenarios other than the preceding one, the request for creating a bucket with the same name as that of an existing one will receive the 409 code (indicating that a namesake bucket already exists). To set an access control policy for the bucket to be created, you can add the x-obs-acl parameter to request headers.

#### Storage Class

You can create buckets with different storage classes. The x-obs-storage-class header in a bucket creation request specifies the default storage class for a bucket. The storage class of the objects in a bucket is the same as that of the bucket. There are three storage classes: STANDARD (Standard storage class), WARM (Warm storage class), and COLD (Cold storage class) If this header is not in the request, the storage class of the created bucket is Standard.

If the storage class of an object is not specified when it is uploaded to a bucket (see Uploading Objects - PUT), the object will be stored in the default storage class of the bucket.

- OBS Standard features low access latency and high throughput. It is most suitable for storing frequently accessed (multiple times per month) hot files. Potential application scenarios include big data, mobile applications, trending videos, and social media images.
- OBS Warm storage class is suitable for storing data that is infrequently accessed (less than 12 times a year) yet has quick response requirements. Potential application scenarios include file synchronization or sharing and enterprise backup. It provides the same durability, access latency, and throughput as the Standard storage class but at a lower price. However, the Warm storage class has lower availability than the Standard one.
- OBS Cold storage class is applicable to archiving rarely-accessed (averagely once a year) data. The application scenarios include data archiving and long-term data retention for backup. The Cold storage class is secure, durable, and inexpensive, which can replace tape libraries. However, it may take hours to restore data from the Cold storage class.

#### Request Syntax

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    PUT / HTTP/1.1
    Host: bucketname.obs.region.example.com
    Content-Length: length
    Date: date
    Authorization: authorization
    <CreateBucketConfiguration xmlns="http://obs.region.example.com/doc/2015-06-30/">
        <Location>location</Location>
    </CreateBucketConfiguration>

#### Request Parameters

This request contains no parameter.

#### Request Headers

The operation message header is the same as that of a common request. For details, see Table 3. However, this request can contain additional headers. The following table describes the additional headers for this request.

Table 1 Additional request headers
Header | Description | Mandatory
--- | --- | ---
x-obs-acl | When creating a bucket, you can add this header to set the permission control policy for the bucket. The predefined common policies are as follows: private, public-read, public-read-write, public-read-delivered, and public-read-write-delivered. Type: string | No
x-obs-storage-class | When creating a bucket, you can add this header to set the default storage class of the bucket. The default storage classes are as follows: STANDARD (Standard storage class), WARM (Warm storage class), and COLD (Cold storage class). If this header is not in the request, the storage class of the bucket created is Standard. Type: string | No
x-obs-grant-read | This header grants the read permission to all users under an account. It allows you to list objects in a bucket, list multipart tasks in a bucket, list multi-version objects in a bucket, and obtain bucket metadata. Type: string Example: x-obs-grant-read:id=Tenant ID. | No
x-obs-grant-write | This header grants the write permission to all users under an account. Therefore, the users can create, delete, and overwrite all objects in a bucket, and can initialize parts, upload parts, copy parts, merge parts, and cancel multipart upload tasks. Type: string Example: x-obs-grant-write:id=Tenant ID. | No
x-obs-grant-read-acp | This header grants the ACL read permission to all users under an account. Therefore, the users can read the bucket ACL information. Type: string Example: x-obs-grant-read-acp:id=Account ID. | No
x-obs-grant-write-acp | This header grants the ACL write permission to all users under an account. Therefore, the users can modify the ACL of the bucket. Type: string Example: x-obs-grant-write-acp:id=Account ID. | No
x-obs-grant-full-control | This header grants the full control permission to all users under an account. Type: string Example: x-obs-grant-full-control:id=Account ID. | No
x-obs-grant-read-delivered | This header grants the read permission to all users under an account. By default, the read permission is applied to all objects in the bucket. Type: string Example: x-obs-grant-read-delivered:id=Account ID. | No
x-obs-grant-full-control-delivered | This header grants the full control permission to all users under an account. By default, the FULL_CONTROL permission is applied to all objects in the bucket. Type: string Example: x-obs-grant-full-control-delivered:id=Account ID. | No

x-obs-epid

Enterprise project ID, which can be obtained from the enterprise project service. The value is a universally unique identifier (UUID). The value of a default enterprise project is 0 or does not contain this header. Users who have not enabled the enterprise project service do not need to carry this header either.

Type: string

Example: x-obs-epid:9892d768-2d13-450f-aac7-ed0e44c2585f

No

#### Request Elements

This request can use additional elements. For details about additional elements, see Table 2.

Table 2 Additional request elements
Element | Description | Mandatory
--- | --- | ---

Location

Specifies the region where a bucket will be created.

- When creating a bucket using the endpoint of the default region, note the following:
  - If Location is not specified, the bucket is created in the default region.
  - If Location is specified to other region, the bucket is created in the specified region.
- When creating a bucket using the endpoint of a non-default region, Location must be specified to the region corresponding to the endpoint.

For details about OBS regions and endpoints, see Regions and Endpoints.

Type: string

No

#### Response Syntax

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    HTTP/1.1 status_code
    Location: location
    Date: date
    Content-Length: length

#### Response Headers

The response to the request uses common headers. For details, see Table 1.

#### Response Elements

This response involves no elements.

#### Error Responses

No special error responses are involved. For details about error responses, see Table 2.

#### Sample Request 1

Create a bucket.

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    PUT / HTTP/1.1
    User-Agent: curl/7.29.0
    Host: examplebucket.obs.region.example.com
    Accept: */*
    Date: WED, 01 Jul 2015 02:25:05 GMT
    Authorization: OBS H4IPJX0TQTHTHEBQQCEC:75/Y4Ng1izvzc1nTGxpMXTE6ynw=
    Content-Length: 157

    <CreateBucketConfiguration xmlns="http://obs.region.example.com/doc/2015-06-30/">
        <Location>region</Location>
    </CreateBucketConfiguration>

#### Sample Response 1

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    HTTP/1.1 200 OK
    Server: OBS
    x-obs-request-id: BF260000016435CE298386946AE4C482
    Location: /examplebucket
    x-obs-id-2: 32AAAQAAEAABSAAgAAEAABAAAQAAEAABCT9W2tcvLmMJ+plfdopaD62S0npbaRUz
    Date: WED, 01 Jul 2015 02:25:06 GMT
    Content-Length: 0

#### Sample Request 2

Create a bucket with a specified ACL and storage class.

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    PUT / HTTP/1.1
    User-Agent: curl/7.29.0
    Host: examplebucket.obs.region.example.com
    Accept: */*
    Date: WED, 01 Jul 2015 02:25:05 GMT
    x-obs-acl:public-read
    x-obs-storage-class:STANDARD
    Authorization: OBS H4IPJX0TQTHTHEBQQCEC:75/Y4Ng1izvzc1nTGxpMXTE6ynw=
    Content-Length: 157

    <CreateBucketConfiguration xmlns="http://obs.region.example.com/doc/2015-06-30/">
        <Location>region</Location>
    </CreateBucketConfiguration>

#### Sample Response 2

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    HTTP/1.1 200 OK
    Server: OBS
    x-obs-request-id: BF260000016435CE298386946AE4C482
    Location: /examplebucket
    x-obs-id-2: 32AAAQAAEAABSAAgAAEAABAAAQAAEAABCT9W2tcvLmMJ+plfdopaD62S0npbaRUz
    Date: WED, 01 Jul 2015 02:25:06 GMT
    Content-Length: 0

Parent topic: Operations on Buckets