SnapVault allows a secondary NetApp filer to store SnapProtect
snapshots. Multiple primary NetApp file servers can backup data to this secondary
filer. Typically, only the changed blocks are transferred, except for the first
time where the complete contents of the source need to be transferred to
establish a baseline. After the initial transfer, snapshots of data on the destination
volume are taken and can be independently maintained for recovery purposes.
SnapMirror is a replication solution that can be used for disaster recovery
purposes, where the complete contents of a volume or qtree is mirrored to a
destination volume or qtree.
Prerequisites
Licenses
The NetApp SnapVault/SnapMirror feature requires the NetApp Snap
Management license.
SnapRestore license for Revert operations (LUNs and NFS
shares).
FlexClone license for backup and restore operations of NFS
shares.
iSCSI Initiator must be configured on the client and
proxy computers to access the storage device.
For the Virtual Server Agent,
the iSCSI Initiator is required when the agent is configured on a separate
physical server and uses iSCSI datastores. The iSCSI Initiator is not
required if the agent is using NFS datastores.
FFCP, ISCSI, CIFS, NFS licenses for features such as
Fiber Channel Protocol, iSCSI protocol, CIFS file sharing, and NFS File
Sharing. Use the appropriate license for the specific data types.
Protection Manager, Operations Manager, and Provisioning Manager
licenses for DataFabric Manager 4.0.2 or later.
SnapMirror Primary and Secondary Licenses for disaster recovery
operations.
SnapVault Primary and Secondary License for backup and recovery
operations.
HTTP/HTTPS licenses on the NetApp file server to allow communication.
Array Software
DataFabric Manager (DFM) - A server running NetApp DataFabric® Manager
server software. DataFabric Manager 4.0.2 or later is required.
SnapMirror - NetApp replication technology used for disaster recovery.
SnapVault - NetApp replication technology used for backup and recovery.
Setting Up SnapVault
Before using SnapVault and SnapMirror, ensure the following conditions are met:
On your source file server, use the license
command to check that the sv_ontap_pri and sv_ontap_sec
licenses are available for the primary and secondary file servers respectively.
Enable SnapVault on the primary and secondary file servers as shown below:
options snapvault.enable on
On the primary file server, set the access permissions for the secondary
file servers to transfer data
from the primary as shown in the example below:
On the secondary file server, set the access permissions for the primary
file servers to restore data
from the secondary as shown in the example below:
Once you have the environment setup for using SnapVault and SnapMirror, you
need to configure the following before performing a SnapVault or SnapMirror
operation.
After the Storage Policy is created along with the Primary Snap Copy, the
Secondary Snap Copy must be created on the new Storage Policy.
1.
From the CommCell Browser, navigate to Policies |
Storage Policies.
Right-click the storage policy and click
All Tasks |
Create New Snapshot Copy.
2.
Enter the Copy Name.
Select the Library and MediaAgent from the
drop-down list.
Click Vault/Backup or Mirror protection type based
on your needs.
It is recommended that the selected disk library uses a CIFS or NFS share
or a LUN on
the File server.
3.
Click the Copy Policy tab.
Depending on the topology you want to set up, click Specify Source for
Auxiliary Copy and select the source copy.
Copies can be created for the
topologies listed in the following table:
Topology
Source Copy
Primary-Mirror
Primary
Primary-Mirror-Vault
Mirror
Primary-Vault
Primary
Primary-Vault-Mirror
Vault
Primary-Mirror-Mirror
Mirror
4.
Click the Provisioning tab.
Click Refresh to
display the DFM entities.
Select the Provisioning Policy from the drop-down list.
Select the Resource Pools available from the list.
Click OK.
The secondary snapshot copy is created.
5.
If you are using a Primary-Mirror-Vault (P-M-V) or Primary-Vault (P-V)
topology on ONTAP version higher than 7.3.5 (except ONTAP 8.0 and 8.0.1), perform the
following steps:
Connect to the storage device associated with the source copy of
your topology. You can use SSH or Telnet network protocols to access
the storage device.
The following steps describe the instructions to set up the primary
and secondary arrays.
1.
From the CommCell Console, navigate to Tools |
Control Panel.
Click Array Management.
2.
Click Add.
3.
Select NetApp from the Snap Vendor list.
Specify the name of the primary file server in the Name
field.
The name of primary file server may be different in the DataFabric Manager, CommServe, MediaAgent and other
entities, but it should resolve to the same IP address.
However, if you plan to create a Vaut/Mirror copy, ensure the IP
address of the primary file server resolves to the primary IP of the
network interface and not to an alias.
You can provide the host name, fully qualified
domain name or TCP/IP address of the file server.
Enter the user access information in the Username and
Password fields.
Select File Server, then click Primary for the array type.
Use the Description field to enter a description about
the entity. This description can include information about the
entity's
content, cautionary notes, etc.
Click OK.
4.
Click Add again to enter the information for the
secondary array.
Specify the name of the secondary file server in the Name
field.
The name of secondary file server may be different in the
DataFabric Manager, CommServe, MediaAgent and other
entities, but it should resolve to the same IP address.
Enter the user access information in the Username and
Password fields.
Select File Server for
the array type.
Use the Description field to enter a description about
the entity. This description can include information about the
entity's
content, cautionary notes, etc.