Restoring Archive or Deep Archive Objects

Functions

To obtain the content of an object in the Archive or Deep Archive storage class, you need to restore the object first and then you can download it. After an object is restored, a copy of the object is saved in the Standard storage class. By doing so, the object in the Archive or Deep Archive storage class and its copy in the Standard storage class co-exist in the bucket. The copy will be automatically deleted once its retention period ends.

Versioning

By default, this operation returns the latest version of an object. If the object has a delete marker, status code 404 is returned. To restore an object of a specified version, the versionId parameter can be used to specify the desired version.

Request Syntax

POST /ObjectName?restore&versionId=VersionID HTTP/1.1 
Host: bucketname.obs.region.myhuaweicloud.com 
Date: date
Authorization: authorization string
Content-MD5: MD5

<RestoreRequest> 
   <Days>NumberOfDays</Days> 
   <RestoreJob> 
       <Tier>RetrievalOption</Tier> 
   </RestoreJob> 
</RestoreRequest>

Request Parameters

Parameter	Type	Mandatory (Yes/No)	Description
versionId	String	No	Explanation: Version ID of the Archive or Deep Archive object to be restored Restrictions: None Value range: None Default value: None. If this parameter is not configured, the latest version of the object is specified.

Parameter

Type

Mandatory (Yes/No)

Description

versionId

String

Explanation:

Version ID of the Archive or Deep Archive object to be restored

Restrictions:

None

Value range:

None

Default value:

None. If this parameter is not configured, the latest version of the object is specified.

Request Headers

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

Request Elements

**Table 1** Request elements
Element	Type	Mandatory (Yes/No)	Description
RestoreRequest	Container	Yes	Explanation: Container for the restore information Restrictions: None Value range: None Default value: None
Days	Integer	Yes	Explanation: After an object is restored, a Standard copy of it is generated. This parameter specifies how long the Standard copy can be retained, that is, the validity period of the restored object. Restrictions: None Value range: The value ranges from 1 to 30, in days. Default value: None
RestoreJob	Container	No	Explanation: Container for the restore options Restrictions: None Value range: None Default value: None
Tier	String	No	Explanation: Retrieval speed tier. You can select a tier that suits your retrieval needs. NOTE: To restore a large number of objects from the Deep Archive storage class, you are advised to use the standard restore. The restore time spent depends on the object size and data volume restored. Value range: Expedited indicates that objects can be quickly restored from Archive storage within 1 to 5 minutes and from Deep Archive storage (in a beta test) within 3 to 5 hours. Standard indicates that objects can be restored from Archive storage within 3 to 5 hours and from Deep Archive storage (in a beta test) within 5 to 12 hours. Default value: Standard

Response Syntax

    
         HTTP/1.1 status_code
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

**Table 2** List of OBS access error codes
Error Code	Description	HTTP Status Code
RestoreAlreadyInProgress	Explanation: The object is being restored. The request conflicts with another. ErrorMessage: Object restore is already in progress	409 Conflict
ObjectHasAlreadyRestored	Explanation: The objects have been restored and the retention period of the objects cannot be shortened. ErrorMessage: After restoring an archived object, you cannot shorten the restoration period of the archived object	409 Conflict
MalformedXML	Explanation: Invalid value for the Days field (supposed to be an integer) ErrorMessage: The XML you provided was not well-formed or did not validate against our published schema	400 Bad Request
InvalidArgument	Explanation: Invalid value for the Days field (valid range: 1 to 30). ErrorMessage: restoration days should be at least 1 and at most 30	400 Bad Request
MalformedXML	Explanation: Invalid value for the Tier field. ErrorMessage: The XML you provided was not well-formed or did not validate against our published schema	400 Bad Request
InvalidObjectState	Explanation: The restored object is not in the Archive or Deep Archive storage. ErrorMessage: Restore is not allowed, as object's storage class is not COLD or DEEP_ARCHIVE	403 Forbidden

Sample Request

    
         POST /object?restore HTTP/1.1
Host: examplebucket.obs.region.myhuaweicloud.com
Accept: */*
Date: WED, 01 Jul 2015 04:39:46 GMT
Authorization: OBS H4IPJX0TQTHTHEBQQCEC:kaEwOixnSVuS6If3Q0Lnd6kxm5A=
Content-Length: 183

<RestoreRequest>
   <Days>2</Days> 
   <RestoreJob>
     <Tier>Expedited</Tier>
   </RestoreJob> 
</RestoreRequest>

Sample Response

    
         HTTP/1.1 202 Accepted
Server: OBS
x-obs-request-id: A2F500000163F374CCBB2063F834C6C4
x-obs-id-2: 32AAAUgAIAABAAAQAAEAABAAAQAAEAABCSLbWIs23RR95NVpkbWlJdlm8Dq+wQBw
Date: WED, 01 Jul 2015 04:39:46 GMT
Content-Length: 0