Functions

This operation can truncate an object to a specified size.

This API is supported only by parallel file systems. For details about how to create a parallel file system, see Sample Request: Creating a Parallel File System.

Request Syntax

PUT /ObjectName?truncate&length=Length HTTP/1.1
Host: bucketname.obs.region.example.com
Authorization: authorization
Content-Length: length
Date: date

Request Parameters

The request needs to specify parameters in the message, indicating that this is to truncate an object to a specified size. Table 1 describes the parameters.

**Table 1** Request parameters
Parameter	Description	Mandatory
truncate	Indicates that the upload is for truncation. Type: string	Yes
length	Size of the object after the truncation Type: integer	Yes

Request headers

This request uses common request headers. For details, see Table 3.

Request Elements

This request involves no elements.

Response Syntax

HTTP/1.1 204 status_code
Server: OBS
x-obs-request-id: request-id
x-obs-id-2: id
Date: Date

Response Headers

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

Response Elements

This response contains no elements.

Error Responses

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

Sample Request

PUT /ObjectName?truncate&length=1000 HTTP/1.1
Host: examplebucket.obs.region.example.com
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:75/Y4Ng1izvzc1nTGxpMXTE6ynw=
Content-Length: 1
Date: WED, 01 Jul 2015 04:19:20 GMT

Sample Response

HTTP/1.1 204 No Content
Server: OBS
x-obs-request-id: 8DF400000163D3F51DEA05AC9CA066F1
x-obs-id-2: 32AAAUgAIAABAAAQAAEAABAAAQAAEAABCSgkM4Dij80gAeFY8pAZIwx72QhDeBZ5
Date: WED, 01 Jul 2015 04:19:21 GMT

Truncating an Object