A step-by-step guide to configure NetApp CDOT NDMP in combination with CommVault Simpana 10

There are some differences in setting up the CommVault Simpana NDMP iDataAgent in combination with NetApp Clustered Data OnTap (CDOT) compared to a 7-mode filer.

This post explains the configuration process to start backing up snapshots stored on a SnapVault NetApp running CDOT by using two-way NDMP.

In case you are using three-way NDMP to protect the data stored on the filer, some of the steps are not required. I will list those throughout the procedure.

If you need a better understanding about two-way NDMP vs. three-way NDMP, please refer to my blogpost called: “Lingo Explained: 2-way NDMP vs. 3-way NDMP”.

Before you start, ensure the CommVault Simpana software is running on a supported version. My environment is running CommVault Simpana 10 Service Pack 12 when I performed this integration. More information about the CommVault configuration prerequisites and – requirements can be found on CommVault BOL. The configuration process of NDMP on NetApp CDOT is outlined in a document called “Clustered Data OnTap 8.3 NDMP Configuration Express Guide“.

GENERAL RECOMMENDATIONS:

  1. Try to use controller-based protocols (such as CIFS & NFS) as much as possible. The filer is able to see the contents in these folders, which results in an increased flexibility in the restore process (compared to FC – or iSCSI LUN emulation).
  2. Create one NDMP subclient per volume instead of using one subclient containing all volumes. By splitting a higher level of performance can be achieved as data restores require less tapes to be mounted resulting in an increased recovery (limitation of the way NDMP works).
  3. NDMP backup data cannot be used in combination with Content Indexing (End User Search). If this is a business requirement, consider to use a pseudo client.
  4. Data archiving and stubbing is not supported on NDMP subclients. If this is a business requirement, consider to use a pseudo client.

PREREQUISITES:

  1. Before executing the steps outlined in this procedure, verify if all required DNS-entries are created.
  2. In case you are using 2-way NDMP, make sure the tape devices are presented to all controllers within the cluster before executing the procedure outlined below.

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Lingo Explained: 2-way NDMP vs. 3-way NDMP

NDMP or the Network Data Management Protocol can be used to secure data stored on NAS filers (such as NetApp, Hitachi HNAS, EMC Isilon, …). The protocol has been developed by NetApp, before it became an open standard maintained by Storage Network Industry Association (SNIA).

The initial goal to develop the NDMP protocol was to provide a standardized framework which can be used by any backup software, to avoid the need to deploy custom agents on the NAS filer. When no agents could be deployed – which occurred in most cases -, the backup admin was obligated to secure the data by using a proxy server which mounted the volumes by using the CIFS or NFS protocol.

In general we can say the NDMP protocol supports two data protection mechanisms: two-way – and three-way NDMP. Continue reading