reducing backup space taken by OS400 audit journal receiver

I'm not trained in AS400.
We don't use tapes anymore but backup to a remote Data Domain.

AS400's audit journal receiver of our developmt AS400 is taking too much space in our current weekly backups with retention of 6 years.

a) Without compromising on the 6 years' retention, how can we reduce the space taken by the backups in the Data Domain?

b) I suppose weekly backup is taken because the receiver journal is rotated weekly: is there such thing as incremental or
    differential backup in AS400 for audit journals?

c) can we do it monthly with differential backups or what other strategy can we do it?  

d) can it be compressed?   the Data Domain solution we used is from EMC.  Anything on deduplication??

We are on OS400 V7 R2  running DB2
sunhuxAsked:
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sunhuxAuthor Commented:
Another crucial advice needed: how can we transition from the current weekly backups of the journal with 6 years retention to the new strategy of backup that will be recommended here
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sunhuxAuthor Commented:
We can explore loaning an LTO6 tape library/drive if needed from IBM to archive out if needed & keep them on tapes & in the event it's needed, lease back the drive to restore (as restore is very unlikely for this development journal but just in case)
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Gary PattersonVP Technology / Senior Consultant Commented:
https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/rzaki/rzakisavjrnrcv.htm

a) Without compromising on the 6 years' retention, how can we reduce the space taken by the backups in the Data Domain?

Basic options:

1) Reduce the amount of data being journaled.  I'd need to know much more about what you journal, why, and what might be optional.

2) Configure the journal to roll journal receivers over more frequently in order to generate smaller individual journal receivers.

3) Compress the journal receiver when saving.'

b) I suppose weekly backup is taken because the receiver journal is rotated weekly: is there such thing as incremental or
    differential backup in AS400 for audit journals?


Incremental or differential backups back up entire objects.  So if you have a journal receiver that is attached to a journal, and back it up today, then add one more entry, an incremental or differential will detect that the object has changed, and will back up the entire receiver next time.

Common strategy is to change journal receivers (generate a new receiver and end logging to the old one), backup the old receiver, and delete the old receiver.

c) can we do it monthly with differential backups or what other strategy can we do it?  

You can do it whenever you want.

CHGJRN
SAVOBJ
DLTJRNRCV


d) can it be compressed?   the Data Domain solution we used is from EMC.  Anything on deduplication??

standard IBM i SAV* commands support compression.  Not familiar with the specific tool that you use.
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