Re: Recommended Linux Backup
On Thursday October 29 2009 5:14:44 pm lrhorer wrote:
> 1. Back up to removable hard drives
> 2. Span multiple target volumes
> 3. Maintain a virtual fileysystem so all snapshots look like a single
> backup to the user.
> 4. Maintain an easily monitored index so the user can see which drive
> will be needed for a particular backup or restore operation.
> 5. Be able to easily rebuild the index and virtual file system from the
> backup drives (preferebly just one drive) if the database is lost on
> the source system.
tar will do 1, 2, and 4. It might be able to do 5.
How will you reconcile requirement 3 with requirement 2? That is, if you have
multiple target volumes that may not all be mounted, how will the user to able
to see and interact with his or her backups? If you plan on having all the
target volumes connected at once, you might as well create a raid array or use
lvm. Not only will it remove requirement 2, but it will have lower overhead
and can provide some redundancy.
Of course, if you remove your requirement for removable drives, lvm would be
an excellent solution that would do everything that you want.
MM
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