Protection for clustered-data ONTAP NetApp file server volumes

You can create a snapshot-differential-incremental backup of a volume that is on a NetApp file server that is part of a clustered-data ONTAP configuration (c-mode file server). Use the set password command to specify the host name of the cluster management server and the credentials that are required to access its volumes. The process to specify the host name for a c-mode file server is the same for a 7-mode file server.

Restriction: Tivoli® Storage Manager support for snapshot-difference incremental backups of clustered-data ONTAP volumes is supported only on NetApp ONTAP 8.2.1 and newer versions.

You must also associate a storage virtual machine (SVM) host name with a cluster management server and with the SVM name that the NetApp SVM administrator assigns to the storage virtual machine. Data can be protected on infinite or flexible volumes. The volumes can be SAN-attached volumes or NAS-attached.

To associate a storage virtual machine with a cluster management server, you use the backup-archive client set netappsvm command. On the set netappsvm command, you specify the following information:

The host name, or IP address, of the storage virtual machine that mounts the volumes.
The host name, or IP address, of the cluster management server. You must use the same host name or IP address that you used on the backup-archive client set password command when you set the credentials for logging on to the cluster management server.
The name of the SVM that manages the volumes and logical interfaces (LIFs) for the volumes that you want to protect. Contact the SVM administrator to determine which data SVM name to use for a particular storage virtual machine.
Note: NetApp formerly called the data SVM the data Vserver.

The set netappsvm command is typically entered only once. The parameters are stored and are used the next time that you back up a clustered volume that is managed by the storage virtual machine. If you move a storage virtual machine to another cluster management server, you must enter the set netappsvm command again and specify the new cluster management server. If necessary, change the login credentials by using the set password command.

Scenario

A Tivoli Storage Manager user wants to complete a snapshot-differential-incremental backup of a volume that is named datavol. This example assumes that the user is using a Windows backup-archive client to complete the backup and that the volume is mounted as a CIFS share. For AIX® and Linux clients, you use NFS to mount the volumes. In this example, assume that the SVM administrator created the following objects:

A CIFS share exists for the datavol volume; the CIFS share name is also named datavol.
An active directory server to use to authenticate access to the CIFS shares. The Active Directory server host name is ad1.example.com.

Map a drive to the share:
```
net use z: \\vmstghost1.example.com\datavol /u:ad1.example.com\domain_user
```
where:
domain_user is the name of a user account in the example.com domain.
Enter the set netappsvm command to associate the logon credentials for a cluster management server with an SVM, so the backup-archive client can access the volumes that are managed by the SVM:
```
dsmc set netappsvm vmstghost1.example.com cms.example.com svm1
```
where:
vmstghost1.example.com

Is the host name of the storage virtual machine that has the mounted volume. This is the server that was specified on the net use command example in step 1 .

cms.example.com

Is the host name of a cluster management server.

svm1

Is the name that the SVM administrator assigned to the storage virtual machine that was specified by the first parameter. In this example, it is the name that the SVM administrator assigned to vmstghost1.example.com.
By default, HTTP access to the NetApp file server is disabled. If you did not configure your file server to allow access by using HTTP, use the backup-archive client snapdiffhttps option to enable access to the cluster management server, by using the HTTPS protocol.

Start a snapshot differential incremental backup of the share. If you want to use HTTPS to connect to the file server, you must specify the backup-archive client snapdiffhttps option:

dsmc incr z: -snapdiff -snapdiffhttps

The output of the command lists the results of the backup operation:

IBM Tivoli Storage Manager
Command Line Backup-Archive Client Interface
  Client Version 7, Release 1, Level 2.0,
Client date/time: 02/28/2015 07:18:17
(c) Copyright by IBM Corporation and other(s) 1990, 2015. All Rights Reserved.

Node Name: THINKCENTER
Session established with server SERVER1: Windows
  Server Version 6, Release 3, Level 4.0
  Server date/time: 02/28/2015 07:15:43  Last access: 02/28/2015 07:15:27

Incremental by snapshot difference of volume 'z:'
ANS2328I Using Snapshot Differential Change Log.

Connected to NetApp Storage Virtual Machine
 Management Filer Host/IP Address : netapp1mgmt.example.com
 Filer Version Information  : Data ONTAP Release 8.2.1 Cluster-Mode: Fri Mar 21 18:39:00 PDT
 Storage VM Name            : netapp1_client1
 Storage VM Host/IP Address : netapp1-client1.example.com
 Storage VM Volume Style    : Flex
 Login User                 : pete
 Transport                  : HTTP

Performing a Snapshot Differential Backup of volume '\\netapp1-client1.example.com\petevol'
Creating Diff Snapshot.
Using Base Snapshot 'TSM_THIN545274828A6D8_PETEVOL' with timestamp 02/28/2015 14:12:43
Using Diff Snapshot 'TSM_THIN5452761257A58_PETEVOL' with timestamp 02/28/2015 14:13:04
Successful incremental backup of '\\netapp1-client.example.com\petevol'