You can use SnapMirror to create a data protection relationship between SVMs. In this type of data protection relationship, all or part of the SVM's configuration, from NFS exports and SMB shares to RBAC, is replicated, as well as the data in the volumes that the SVM owns.
Only data-serving SVM can be replicated. The following data protection relationship types are supported:
Details about these relationship types can be found here: Understanding SnapMirror volume replication.
The policy type of the replication policy determines the type of relationship it supports. The following table shows the available policy types.
Policy type |
Relationship type |
---|---|
async-mirror | SnapMirror DR |
mirror-vault | Unified replication |
Starting with ONTAP 9.4, SVM data protection relationships default to XDP mode. SVM data protection relationships continue to default to DP mode in ONTAP 9.3 and earlier.
Existing relationships are not affected by the new default. If a relationship is already of type DP, it will continue to be of type DP. The following table shows the behavior you can expect.
If you specify... |
The type is... | The default policy (if you do not specify a policy) is... |
---|---|---|
DP | XDP | MirrorAllSnapshots (SnapMirror DR) |
Nothing | XDP | MirrorAllSnapshots (SnapMirror DR) |
XDP | XDP | MirrorAndVault (Unified replication) |
Details about the changes in the default can be found here: XDP replaces DP as the SnapMirror default.
The content of an SVM replication relationship is determined by the interaction of the following fields:
The -identity-preserve false option replicates only the volumes and authentication and authorization configurations of the SVM, and the protocol and name service settings listed in Configurations replicated in SVM DR relationships.
Otherwise, SVM replication is almost identical to volume replication. You can use virtually the same workflow for SVM replication as you use for volume replication.
The following table shows support details for SnapMirror SVM replication.
Resource or feature | Support details |
---|---|
Relationship types |
|
Replication scope | Intercluster only. You cannot replicate SVMs in the same cluster. |
Version-independence | Not supported. |
Deployment types |
|
Volume encryption |
|
FabricPool | Starting with ONTAP 9.6, SnapMirror SVM replication is supported with FabricPools. |
MetroCluster | Starting with ONTAP 9.5, SnapMirror SVM replication is supported on MetroCluster configurations.
|
SnapMirror Synchronous | Not supported with SVM DR. |
The following table shows the interaction of the snapmirror create -identity-preserve option and the snapmirror policy create -discard-configs network option:
Configuration replicated | -identity-preserve true | -identity-preserve false | ||
---|---|---|---|---|
Policy without -discard-configs network set | Policy with -discard-configs network set | |||
Network | NAS LIFs | Yes | No | No |
LIF Kerberos configuration | Yes | No | No | |
SAN LIFs | No | No | No | |
Firewall policies | Yes | Yes | No | |
Routes | Yes | No | No | |
Broadcast domain | No | No | No | |
Subnet | No | No | No | |
IPspace | No | No | No | |
CIFS | CIFS server | Yes | Yes | No |
Local groups and local user | Yes | Yes | Yes | |
Privilege | Yes | Yes | Yes | |
Shadow copy | Yes | Yes | Yes | |
BranchCache | Yes | Yes | Yes | |
Server options | Yes | Yes | Yes | |
Server security | Yes | Yes | No | |
Home directory, share | Yes | Yes | Yes | |
Symlink | Yes | Yes | Yes | |
Fpolicy policy, Fsecurity policy, and Fsecurity NTFS | Yes | Yes | Yes | |
Name mapping and group mapping | Yes | Yes | Yes | |
Audit information | Yes | Yes | Yes | |
NFS | Export policies | Yes | Yes | No |
Export policy rules | Yes | Yes | No | |
NFS server | Yes | Yes | No | |
RBAC | Security certificates | Yes | Yes | No |
Login user, public key, role, and role configuration | Yes | Yes | Yes | |
SSL | Yes | Yes | No | |
Name services | DNS and DNS hosts | Yes | Yes | No |
UNIX user and UNIX group | Yes | Yes | Yes | |
Kerberos realm and Kerberos keyblocks | Yes | Yes | No | |
LDAP and LDAP client | Yes | Yes | No | |
Netgroup | Yes | Yes | No | |
NIS | Yes | Yes | No | |
Web and web access | Yes | Yes | No | |
Volume | Object | Yes | Yes | Yes |
Snapshot copies, Snapshot policy, and autodelete policy | Yes | Yes | Yes | |
Efficiency policy | Yes | Yes | Yes | |
Quota policy and quota policy rule | Yes | Yes | Yes | |
Recovery queue | Yes | Yes | Yes | |
Root volume | Namespace | Yes | Yes | Yes |
User data | No | No | No | |
Qtrees | No | No | No | |
Quotas | No | No | No | |
File-level QoS | No | No | No | |
Attributes: state of the root volume, space guarantee, size, autosize, and total number of files | No | No | No | |
Storage QoS | QoS policy group | Yes | Yes | Yes |
Fibre Channel (FC) | No | No | No | |
iSCSI | No | No | No | |
LUNs | Object | Yes | Yes | Yes |
igroups | No | No | No | |
portsets | No | No | No | |
SNMP | v3 users | Yes | Yes | No |