Azure Storage - Create blob snapshot

Declaration

<AMAZURESTORAGE ACTIVITY="snapshot_blob" CONTAINER="text" 
BLOB="text" PROTOCOL="text (options)" ACCOUNTNAME="text" 
ACCESSKEY="text (encrypted)" BLOBENDPOINT="text" 
QUEUEENDPOINT="text" TABLEENDPOINT="text" 
TIMEOUT="number" PROXYTYPE="text (options)" 
PROXYSERVER="text" PROXYPORT="number" PROXYUSERNAME="text" 
PROXYPASSWORD="text (encrypted)" />

Description: Creates a read-only snapshot of a blob container.

Practical Usage

A convenient way to back up blob data. Snapshots allow you to possess a ‘copy’ of a blob without needing to pay extra for it, as long as the snapshot does not differ from the original. They can be used to restore a blob to an earlier version or overwrite a base blob with its snapshot. Furthermore, snapshots can improve availability by assigning them as the default storage blob to be accessed by all clients performing read operations, leaving the original blob only for writes.

Connection Parameters

Property Type Required Default Markup Description

Connection

 

 

 

 

Indicates where user credentials and preferences should originate from. This is a design mode parameter used only during task construction and configuration, thus, comprises no markup. The available options are:

  • Host (default) - Specifies that user credentials and/or advanced preferences are configured individually for this activity. This option is normally chosen if only a single activity is required to complete an operation.

  • Session - Specifies that user credentials and/or advanced preferences are obtained from a pre-configured session created in a prior step with the use of the Azure Storage - Create session activity. This option is normally chosen if a combination of related activities are required to complete an operation. Linking several activities to a single session eliminates redundancy. Additionally, a single task supports construction and simultaneous execution of multiple sessions, improving efficiency.

Session

Text

Yes if connection is session-based

AzureStorageSession1

SESSION="MyAzureSession"

The name of an existing session to associate this activity with. This parameter is active only if the Connection parameter is set to Session. The default session name is 'AzureStorageSession1'.

Account name

Text

Yes if connection is host-based

(Empty)

ACCOUNTNAME="myaccount"

The globally unique name of the Windows Azure storage account. This parameter is active only if the Connection parameter is set to Host.

Access key

Text

Yes if connection is host-based

(Empty)

ACCESSKEY="[AccessKey]"

The primary or secondary access key (each composed of 88 ASCII characters) used to authorize access to Azure Storage. This parameter is active only if the Connection parameter is set to Host.

Protocol

Text (options)

No

HTTPS

  1. PROTOCOL="HTTPS"

  2. PROTOCOL="HTTP"

The type of protocol used to access Azure Storage. The available options are:

  • HTTPS (default) - Hypertext Transfer Protocol Secure

  • HTTP - Hypertext Transfer Protocol

Timeout (seconds)

Number

No

90

TIMEOUT="180"

The timeout interval (in seconds) for requests made to the storage service. If the timeout elapses before a server response is returned, the operation times out and the service returns an error. The default timeout value is 90 seconds.

Blob endpoint URI

Text

No

(Empty)

BLOBENDPOINT="http://accnt

.blob.core.windows.net"

The endpoint for the Blob service, as configured for the Azure Storage account. The default Blob service endpoint is ' [http/https]://accountname.blob.core.windows.net' , where 'accountname' is the name of the Azure Storage account.

Queue endpoint URI

Text

No

(Empty)

QUEUEENDPOINT="http:// accnt

.queue.core.windows.net"

The endpoint for the Queue service, as configured for the Azure storage account. The default Queue service endpoint is ' [http/https]://accountname.queue.core.windows.net' , where 'accountname' is the name of the Azure Storage account.

Table endpoint URI

Text

No

(Empty)

TABLEENDPOINT="http://accnt

.table.core.windows.net"

The endpoint for the Table service, as configured for the Azure storage account. The default Table service endpoint is 'Property

Container name

Text

Yes

(Empty)

CONTAINER="mycontainer"

The unique name of the container that comprises the blob to create a snapshot of.

Blob name

Text

Yes

(Empty)

BLOB="myblob"

The unique name of the blob in which to create a snapshot of.

Description tab - A custom description can be provided on the Description tab to convey additional information or share special notes about a task step.

Error Causes tab - Specify how this step should behave upon the occurrence of an error. (Refer to Task Builder > Error Causes Tab for details.)

On Error tab - Specify what AWE should do if this step encounters an error as defined on the Error Causes tab. (Refer to Task Builder > On Error Tab for details.)

Example

The sample AML code below can be copied and pasted directly into the Steps panel of the Task Builder.

Description: Sample Azure Storage blob operations (step description embedded in task).

<!-- Create session -->
<AMAZURESTORAGE ACTIVITY="create_session" 
ACCOUNTNAME="netauto" ACCESSKEY="AM3kbFvH+pgzDo=aME" 
SESSION="AzureSession" />
<!-- Download blob -->
<AMAZURESTORAGE ACTIVITY="donwload_blob" 
CONTAINER="mycontainer" BLOB="mylargeblob" 
FILE="C:\temp\blobcontent.txt" OVERWRITE="yes" 
PROVIDER="session_based" SESSION="AzureSession" />
<!-- Snapshot blob -->
<AMAZURESTORAGE ACTIVITY="snapshot_blob" 
CONTAINER="mycontainer" BLOB="mylargeblob" 
PROVIDER="session_based" SESSION="AzureSession" />
<!-- Delete blob -->
<AMAZURESTORAGE ACTIVITY="delete_blob" 
CONTAINER="mycontainer" BLOB="mylargeblob" 
DELETESNAPSHOT="None" PROVIDER="session_based" 
SESSION="AzureSession" />
<!-- End session -->
<AMAZURESTORAGE ACTIVITY="end_session" 
SESSION="AzureSession" />