Yes. Actually the first DIFF after a full is the same size as an INCR, but they do get bigger over time but not all that much. In my experience unless someone touches a huge file the Friday DIFF is only a couple % bigger than the Monday DIFF. Also as mentioned it's far smaller than FULL/FULL.
Say on Friday a user accidentally deletes a file they don't remember when they last used it - was it Tuesday, or Monday...oh, maybe Wednesday. With NT Backup have fun going through the INCR's to find it. With a DIFF just grab Thursday night's backup set... That's all backup are for anyway aren't right? A restore from PEBCAK file delete errors? :) David Lum // SYSTEMS ENGINEER NORTHWEST EVALUATION ASSOCIATION (Desk) 971.222.1025 // (Cell) 503.267.9764 From: Andrew S. Baker [mailto:asbz...@gmail.com] Sent: Wednesday, September 16, 2009 7:58 AM To: NT System Admin Issues Subject: Re: Diff backups (was RE: Restores from Incremental backups) Yes, potentially. But, the primary goal of backups is recovery. You have to balance the ongoing space needs with the time to restore. With a disk only solution, speed is a little more in your favor, but using DIFFs rather than INCR backups still gives you the advantage if one particular day's backup was bad or unable to restore properly... -ASB: http://XeeSM.com/AndrewBaker On Wed, Sep 16, 2009 at 10:17 AM, Don Kuhlman <drkuhl...@yahoo.com<mailto:drkuhl...@yahoo.com>> wrote: I don't know if it was already covered in this thread, but if you're using Disk backup (a NAS device) aren't you burning up a lot more space with Full/Diffs vs Full/Incr ? Don K ----- Original Message ---- From: David Lum <david....@nwea.org> To: NT System Admin Issues <ntsysadmin@lyris.sunbelt-software.com<mailto:ntsysadmin@lyris.sunbelt-software.com>> Sent: Tuesday, September 15, 2009 7:58:36 AM Subject: Diff backups (was RE: Restores from Incremental backups) Using good ol' NTBackup at all my garage clients I used to do full's on weekends and incrementals other times, until I had to do some restores back to back...holy Mother of God that's a long way around! I went to fulls/diffs and haven't looked back. David Lum // SYSTEMS ENGINEER NORTHWEST EVALUATION ASSOCIATION (Desk) 971.222.1025 // (Cell) 503.267.9764 -----Original Message----- From: Steven M. Caesare [mailto:scaes...@caesare.com<mailto:scaes...@caesare.com>] Sent: Monday, September 14, 2009 2:56 PM To: NT System Admin Issues Subject: RE: Restores from Incremental backups Agreed.. "Synthetic Fulls" have been around for a while. -sc -----Original Message----- From: Andy Ognenoff [mailto:andyognen...@gmail.com<mailto:andyognen...@gmail.com>] Sent: Monday, September 14, 2009 3:24 PM To: NT System Admin Issues Subject: RE: Restores from Incremental backups Been using Retrospect in this capacity since 2006 so maybe the concept is catching on. :) - Andy O. >-----Original Message----- >From: John Cook [mailto:john.c...@pfsf.org<mailto:john.c...@pfsf.org>] >Sent: Monday, September 14, 2009 1:10 PM >To: NT System Admin Issues >Subject: RE: Restores from Incremental backups > >Synthetic backups are the current buzz word, I've heard it in 2 different >pitches in the last 2 weeks. Sounds great if it actually delivers..... ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
