Veritas Storage Foundation 5.1 SP1: Storage and Availability Management for Oracle (5900-1504, April 2011)

from any of the NetBackup clients. Client users can perform database backups

and restores from their client systems on demand.

About using Veritas NetBackup to backup and restore

Oracle Disk Manager files

Oracle allocates Oracle Disk Manager files with contiguous extent layouts for

good database performance. When you back up your database using Veritas

NetBackup, extent attributes are backed up automatically. When you restore

database files they are allocated using these extent attributes. If you are using

Oracle RMAN's conventional backup method with any backup software, datafiles

are also restored with the proper extent layouts.

If you are not using NetBackup or you are using RMAN's “proxy copy” backup

method with a backup software other than NetBackup, the extent attributes may

not be backed up. To ensure the restored datafiles have proper extent layouts,

preallocate the lost datafiles using the odmmkfile command. This command

preallocates contiguous space for files prior to restoring them.

See the odmmkfile(1M) manual page.

For example, to preallocate an Oracle datafile with size 100 M, assuming the Oracle

database block size is 8K, use the odmmkfile command and enter:

$ /opt/VRTS/bin/odmmkfile -h 8k -s 100m filename

Using Veritas NetBackup to backup and restore Quick

I/O files for Oracle

If you are using NetBackup for Oracle, then you should use Oracle RMAN to backup

and restore Quick I/O files.

Veritas NetBackup does not follow symbolic links when backing up files. Typical

backup management applications are designed this way to avoid backing up the

same data twice. This would happen if both the link and the file it points to were

included in the list of files to be backed up.

A Quick I/O file consists of two components: a hidden file with the space allocated

for it, and a link that points to the Quick I/O interface of the hidden file. Because