[Ticket #11] [firebird-support] Questions about nbackup
This is a notification from the Help Desk. On Mar 07, 2014 @ 03:24 pm, a...@ib-aid.com wrote: Hello, > > I have been looking into switching from gbak to nbackup. From what I > have read about nbackup I am left with some, possibly incorrect, > impressions. > > 1) nbackup is a page level backup rather than a row-by-row backup like > gbak. > 2) nbackup does no integrity checking of the database as it is backed > up. It simply copies the database page by page. > 3) If 2) is true, then this would seem to imply that I could back up a > corrupted database using nbackup without ever knowing that the > database was corrupt. > 4) If 2) & 3) are true this would seem to imply that I could restore a > corrupted database using nbackup and wind up with a corrupted > database, the same as the original. > In general, you are right. Read this presentation about backups in Firebird, it has more details about corruptions and gbak/nbackup: http://www.slideshare.net/ibsurgeon/everything-about-backups-firebird-by-dmitry-kuzmenko-ceo-ibsurgeon Regards, Alexey Kovyazin IBSurgeon (www.ib-aid.com) > > Please feel free to correct my misconceptions. > > [Non-text portions of this message have been removed] -- This is an automated response. Your issue has been noted. We'll be in touch soon. Please reply to this email or visit the URL below with any additional details. http://DANTOIN:9675/portal/view-help-request/11 [Non-text portions of this message have been removed]
Re: [firebird-support] Questions about nbackup
Hello, > > I have been looking into switching from gbak to nbackup. From what I > have read about nbackup I am left with some, possibly incorrect, > impressions. > > 1) nbackup is a page level backup rather than a row-by-row backup like > gbak. > 2) nbackup does no integrity checking of the database as it is backed > up. It simply copies the database page by page. > 3) If 2) is true, then this would seem to imply that I could back up a > corrupted database using nbackup without ever knowing that the > database was corrupt. > 4) If 2) & 3) are true this would seem to imply that I could restore a > corrupted database using nbackup and wind up with a corrupted > database, the same as the original. > In general, you are right. Read this presentation about backups in Firebird, it has more details about corruptions and gbak/nbackup: http://www.slideshare.net/ibsurgeon/everything-about-backups-firebird-by-dmitry-kuzmenko-ceo-ibsurgeon Regards, Alexey Kovyazin IBSurgeon (www.ib-aid.com) > > Please feel free to correct my misconceptions. > > [Non-text portions of this message have been removed]
[firebird-support] Questions about nbackup
I have been looking into switching from gbak to nbackup. From what I have read about nbackup I am left with some, possibly incorrect, impressions. 1) nbackup is a page level backup rather than a row-by-row backup like gbak. 2) nbackup does no integrity checking of the database as it is backed up. It simply copies the database page by page. 3) If 2) is true, then this would seem to imply that I could back up a corrupted database using nbackup without ever knowing that the database was corrupt. 4) If 2) & 3) are true this would seem to imply that I could restore a corrupted database using nbackup and wind up with a corrupted database, the same as the original. Please feel free to correct my misconceptions.
