Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

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
NetBackup does not follow symbolic links, you must specify both the Quick I/O
link and its hidden file in the list of files to be backed up.
To view all files and their attributes in the db01 directory:
$ ls -la /db01
total 2192
drwxr-xr-x 2 root root 96 Oct 20 17:39 .
drwxr-xr-x 9 root root 8192 Oct 20 17:39 ..
-rw-r--r-- 1 oracle dba 1048576 Oct 20 17:39
.dbfile
lrwxrwxrwx 1 oracle dba 22 Oct 20 17:39
dbfile ->\
.dbfile::cdev:vxfs:
In the example above, you must include both the symbolic link dbfile and the
hidden file .dbfile in the file list of the backup class.
If you want to back up all Quick I/O files in a directory, you can simplify the process
by just specifying the directory to be backed up. In this case, both components of
each Quick I/O file will be properly backed up. In general, you should specify
directories to be backed up unless you only want to back up some, but not all files,
in those directories.
Because Veritas NetBackup is integrated with Veritas Storage Foundation, Veritas
NetBackup backs up extent attributes of a Quick I/O file and restores them
accordingly. Quick I/O files can then be backed up and restored as regular files
using Veritas NetBackup, while preserving the Quick I/O file's extent reservation.
Without this feature, restoring the file could cause the loss of contiguous
reservation, which can degrade performance.
When restoring a Quick I/O file, if both the symbolic link and the hidden file
already exist, Veritas NetBackup will restore both components from the backup
image. If either one or both of the two components are missing, Veritas NetBackup
creates or overwrites as needed.
Using Veritas NetBackup for database backup
Using Veritas NetBackup to backup and restore Quick I/O files
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