[Veritas-bu] What is cumulative incremental???

I don't know what to tell you regarding why you're getting a 74Gig Delta
between Sunday and Monday, but if you are doing a cumulative incremental
and expecting 4Gig a day, then what you should expect, after that
initial 74Gig delta, is subsequent backups of:
 
Monday 74Gig, 
Tuesday 78Gig
Wednesday 82Gig
Thursday 86Gig
 
etc, untill the next FULL, as each cumulative looks back to the last
FULL for a baseline.
 
if you only want to backup the delta of each individual day, ie:
Sunday, 120Gig
Monday 4 Gig
Tuesday 4 Gig
Wednesday 4 Gig
 
then you want to use the differential incremental type.
 
granted, if there's something accessing the disk and updating the
archive bit, causing that 74Gig jump, you might end up with
 
Sunday 120 Gig
Monday 74 Gig
Tuesday 74 Gig
Wednesday 74 Gig
-- 

        -----Original Message-----
        From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Veritas
Netbackup
        Sent: August 16, 2006 3:00 PM
        To: veritas-bu at mailman.eng.auburn.edu
        Cc: biju.krishnan at 3i-infotech.com; sysadmin-oprs at icicibank.com
        Subject: [Veritas-bu] What is cumulative incremental???
        
        
        We backup a CIFS network drive, which stores scanned images on a
windows machine, to which it is mapped.
        
        Since Images are'nt modified they are just read. The application
team claims that the drive gets updated with 4 GB of data everyday.
        
        We have used a cumulative Incremental backup type and it is
observed that
        
        SUN -> Full backup -> 120 GB
        
        Mon -> cumulative incremental backup -> 74 GB
        
        Tue -> cumulative incremental 76 GB
        
        Why is the backup so huge when we have specified only cumulative
incremental?? The backup size shd have been approx 8 GB by TUE.
        
        Another question is whether we can identfiy images about to
expire on a particular day??? I need to identify images which have'nt
been vaulted and which are nearing expiry.
        
        Regards,
        PP BIJU KRISHNAN
        
        
        

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