Just want to find out what's the difference between incremental delta backup and without configured for incremental ? Without Culmulative or delta, I just use one full backup + all the logs since last full backup. Similarly, when restore for incremental delta. it also require full db backup + delta + logs.. to recover full db.
the only benefits using incremental backup is performance, with incremental delta recoveries I can perform faster than recover using just logs, probably delta had already consolidate all changes whereas when recovery logs, it will take more time to replay. Am I interpret correctly ?
advantage of incr or incr delta is size of backup image
the time is similar as it scans all pages to see if the page has been flagged as modified
restore can take longer : start restore with last backup - full backup and intermediate needed backup and end with last backup - rollforward
see infocenter for all details
Best Regards, Guy Przytula
Database Software Consultant
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Thanks guys, I believe there must be a reason why delta was introduced if the performance is same right ? otherwise I just replay all the logs will do. Anyone can explain deeper how it achieve better performance maybe internally how it works. Thanks.