On Sat, Feb 07, 2009 at 08:55:27AM -0500, Nick Smith wrote:
> ok, i use volume shadow so i dont need to dump.

Umm, I assume you are telling the database that you are going to
snapshot it's database so it syncs all of the data to disk to make it
consistant when you snaphot the volume right?

If the database support PITR, you must be doing the standard backup a
corrupted database and the rollback/journal logs that are needed to
recover the corrupted database.

If you aren't doing one of these two things (manually or
automatically) and have restorable backups, you are just lucky.

> what does it do for the backup after you have dumped the DB?
> does it only take what has changed since the
> last dump or does it take the entire dump?

If the file is changed, it backs up the entire file, but using rsync
it only transfers deltas between the prior verion of the file and the
current version. If using tar/smb it copies the entire fileover the
wire.

Also it can compress the file on disk. Do you see files under
/backuppc-root/cpool? Does the compressed size of the source file
approximate the size of the file you find on disk?

-- 
                                -- rouilj

John Rouillard
System Administrator
Renesys Corporation
603-244-9084 (cell)
603-643-9300 x 111

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