Item 1: allow bacula to alias one directory path to another
Origin: Mark Bergman <[EMAIL PROTECTED]>
Date: Mon Apr 9 11:26:31 EDT 2007
Status:
What: Allow bacula to alias one directory path for another.
Why: Snapshots (or other means of copying a directory tree) may appear under
a mount point, but all references to the data (for future restores)
should point to the original location. An "alias" within bacula would
enable this path substitution.
Notes: Many operating systems and storage devices (SAN or NAS) allow a
snapshot to be made of a filesystem, often for backup purposes.
Since bacula does file-level backups, the snapshot needs to be mounted
as a filesystem. However, this means that the backup will be associated
with the mount point, not with the original data.
For example, if a snapshot of server1:/active/db/directory
is mounted under server1:/snapshot, bacula would do the backup
of /snapshot.
The requested alias feature would allow users to:
exclude /active/db/directory
include /snapshot/active/db/directory
alias /snapshot/active/db/directory to /active/db/directory
this means that the backup catalog (and--most importantly, future
restores) would reference /active/db/directory when searching for
files. Since the underlying storage system (SAN, NAS, LVM, etc.) handles
the snapshot feature and ensures that the data is consistent, the
backup is truely of the data in /active/db/directory.
----
Mark Bergman [EMAIL PROTECTED]
System Administrator
Section of Biomedical Image Analysis 215-662-7310
Department of Radiology, University of Pennsylvania
http://pgpkeys.pca.dfn.de:11371/pks/lookup?search=mark.bergman%40.uphs.upenn.edu
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