Pre-requisites for Lenovo DM 5000 SnapDiff
On the clustered Data ONTAP SnapDiff RPC API V2 is supported from ONTAP release 9.4 onwards till ONTAP 9.9.
You must enable SnapDiff RPC service on the SVM. Follow the steps:
controller> vserver snapdiff-rpc-server on <svm_name>
For more information, refer to the Lenovo DM documentation for latest and accurate methods to enable snapdiff-rpc-server.
To improve performance while fetching the SnapDiff data between two snapshots, max_diffs and max_sessions must be set on the filer.
By default, SnapDiff RPC API V2 max_diff is set to 256 and max_sessions are set to 16.
Max limit for max_diff is 4096 and max_sessions is 64.
Procedure
Set max_diff limit to 4096
controller> node run -node * options replication.spinnp.snapdiff.max_diffs 4096
Set max_session limit to 64
controller> node run -node * options replication.spinnp.snapdiff.max_sessions 64
For more information on the latest and accurate methods to set max_diffs/max_sessionsto, refer to the Lenovo DM documentation.
To configure ACL on Lenovo DM array, follow the steps:
Log on to the On Command System Manager.
Navigate to the respective SVM where the SMB volume is created.
Click the SVM setting.
On the left click the Windows under Host Users and Groups. The Groups and Users tabs are displayed.
In the Groups tab, click the BUILTIN\Backup Operators and select Edit option.
In the Modify dialog, under the Members section, add the domain user and select the SetBackupPrivilege, SetRestorePrivilege, and SetSecurityPrivilege privileges.
In Lenovo DM array NetBackup discovers the volumes, LUNs that are created on the storage array. It also, discovers the snapshots of these assets.
NetBackup discovers all the NFS and SMB shares using volumes NAS path on the Lenovo DM storage.
Discovers the Lenovo DM Storage Virtual Machines (SVMs) from which the NFS and SMB shares are created to mount.
It will only discover volumes which are online.
If old snapshot is selected during restore (PIT), all new snapshots created after that snapshot gets deleted automatically from the array.
A single LUN can be part of only one volume at a time.
The host on which the snapshot is exported must be zoned and added to the Storage Virtual Machine (SVM).
A snapshot cannot be exported multiple hosts.
An exported snapshot cannot be deleted.
The export operation fails if the volume is attached only to the Default export policy on Lenovo DM. You must assign the NAS volume to a non-default export policy.
Minimum supported ONTAP version for ZAPI is 8.3
Minimum supported ONTAP version is for REST 9.10
Minimum supported ONTAP version for SnapDiff is 9.4 for Lenovo DM NAS Volume snapshots till ONTAP 9.9.