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Netbackup Synthetic Full backups

Created: 17 Apr 2010 | 5 comments

Hello All,

One small and good question,

I am planning for Synthetic backups, I know the process how it works but one thing I am unable to understand is as Synthetic backup is nothing to do with the client, For example sunday regular full backup then mon-fri Incrementals, Do I need to have all these backup medias in the library for synthetic backups.? Because we usually send medias offsite next day of the backup.


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Marianne's picture

Quick answer: yes.
A full Synthetic backup is in essence a consolidated duplication of last full and subsequent incrementals.
The need for original backup copies is a show-stopper for users who send tapes off-site on a daily basis.

Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

anasser's picture

Thank you very much Marianne, So you mean I need to have full+Incremental backup Media's Onsite to run a Synthetic Full

Marianne's picture


Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links

David McMullin's picture

make two copies

If you have to send one off site, you will need to make two copies and keep one on site - suggest you use disk or VTL for that.

If you can make both copies at once, you will save some time...

NBU 7.0.1 on Solaris 10
writing to EMC 4206 VTL
duplicating to LTO5 in SL8500
using ACSLS 7.3.1

Kalejo's picture

I'm new to Netbackup, and I could do with some advice on how to set up the policy for my companies backup please.
The company has asked me to setup a backup to cover the following.

We have 1 Netbackup Master backup/Media Server, with a standalone Storagetek drive which used HCART LTO tapes, we have 2 Netbackup clients that require backups, I cant put in the same policy because the directories that require backups on each server are in different. 

Incremental on three tapes to cover 6 days
Monday  - Saturday
1) Daily 1 Tape to be used on Monday's and Thursday
2) Daily 2 Tape to be used on Tuesday and Friday
3) Daily 3 Tape to be used on Wednesday and Saturday

Weekly Full Backups will use 3 tapes on the following a number of writes Weekly 1tape will be removed an put in a Volt for Archives a new tape will be introduced to the tape Pool.

1) Weekly 1
2) Weekly 2
3) Weekly

Thanks in advance.