[rescue] Mounting and Dumping
lionel4287 at yahoo.com
Thu Jan 15 11:46:41 CST 2004
--- Andrew Weiss <ajwdsp at cloud9.net> wrote:
> So why can't a program for backup take in principle a system that is
> going to be backed up at off hours, create a large RAM disk of 1GB or
> so (larger if you can afford it), lock the original filesystem for
> read access only, accept all writes as journal entries to the
> RAMdisk, finish backing up the read-only (and mounted system), and
> then examine the RAMdisk and if there were any changes have an
> option to either immediately apply the journal to the backup
> (slow), or... back up the journal after the original set on the
> tape. Then allow selective point in time restore at a later date.
I believe the technical name for this is called a "database" ;^)
This is how Oracle (at least used to) perform it's backups...
"I am not into examining other peoples' dumps..." - Sheldon T. Hall
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