> how to make NetBackup backup what a symlink points
Correct if I'm wrong, but I'd say even if this is possible( would be
follow the symlinks option for tar, which NBU basicaly use ), it would be
an exception which we'd have to explicitly specify.
After all a symlink is a file on it's own and backup should not care if
the content of that file has a pointer or actual data - the job is to dump
the file itself.
Note, that bpbrm does warn us about the links:
bpbrm/log.042807:15:40:37.162 [11602] <8> bpbrm handle_backup: from client
cometstg-bk: WRN - /ARDBS01/sybdump is only being backed up as a symbolic
link
I got intrigued myself to know and here are another bits of info I just
found:
man bpbackup yields:
o If you specify a UNIX file that is a link, bpbackup
backs up only the link itself, not the file to which it
links.
NBU 5.1 SA Guide, Chapter 3, Managing Backup Policies, page 113
Symbolic Links to Files or Directories
For symbolic (soft) links, include the file path to the source file in
your list in order to back up the actual data. If a file is a symbolic
link to another file, NetBackup backs up only the link, not the file to
which the link points. This prevents multiple backups of the source file.
Because symbolic links are restored only as a symbolic link to the source
file, you must restore the source file along with the link in order to get
the data.
and
Chapter 4, Managing Catalogs and Images, page 212
Caution Do not specify a link as the final component in a UNIX path or the
entire catalog backup will fail. While NetBackup follows links at other
points in the path, NetBackup does not follow a link when it is the final
component. If any other part of a listed path is a symbolic link,
NetBackup saves the actual path during the backup.
So the open question is "Can we force NBU to follow the links, as GNU tar
does ?"
This message uses only 100% recycled electrons.
Justin Piszcz <jpiszcz at lucidpixels.com>
Sent by: veritas-bu-bounces at mailman.eng.auburn.edu
05/02/2007 10:44 AM
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NB List Mail <veritas-bu at mailman.eng.auburn.edu>
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Subject
[Veritas-bu] Question: Backup what the symlink points to?
This concerns UNIX:
I need to look this up but was wondering if anyone knew off the top of
their head how to make NetBackup backup what a symlink points to or if
that is even possible?
I know about the cross-link option but that concerns mounts and
filesystems, not sym-links.
Justin.
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