Data Protector NDMP Integration Quickstart Guide

Figure 15: Backup summary

6. On Advanced NDMP Object Properties you can now specify your backup specific environment

variable, such as EXCLUDE to exclude specific file types or directories.

Note: Consult the NAS filer administrator handbook for supported environment variables and their

usage.

Performance and implementation considerations

As described earlier in this paper, there are two methods of backing up the data on NAS filers. The

first method uses the regular file system backup of the application server. The NAS share is backed up

using the same process as the backup of a file system on a local disk. This method is well understood

and simple, but not optimized for NAS filer protection.

The second method uses NDMP to enable a direct backup from the filer to the HP StoreOnce Backup

System. This requires additional setup and licensing, as covered in detail in this paper, but is

optimized for NAS filer protection. The performance and implementation considerations for both

methods are summarized in Table 1.

Table 1: Summary of performance and implementation differences between the methods of protecting NAS filer data

Regular file system backup

NDMP-controlled backup

Impact on production

servers

Higher; the Data Protector Disk Agent runs on

each protected machine. Requires a backup

window.

None, all processing is done on the filer. No

impact on the data network.

Impact on data network

Higher, all backup data is transmitted over the

data network contending for bandwidth with

the production data. Additional impact if the

None, the backup data is written over the

storage network to the StoreOnce Backup