The message also appears in the 6.2 client ending statistics (without the
ANEnnnn message number), which are described in the client manual. In a
nutshell it reflects the storage savings achieved with use of incremental,
compression, data deduplicaton and so on versus if you backed up the full
content of all scanned files.

For example, suppose an incremental backup operation scans 500 MB worth of
files but only backs up 30 MB. In this case you backed up 6% of the data
(30 MB / 500 MB * 100 = 6). The reduction is the percentage of data you did
not back up, 94%.

Best regards,

Andy

Andy Raibeck
IBM Software Group
Tivoli Storage Manager Client Product Development
Level 3 Team Lead
Internal Notes e-mail: Andrew Raibeck/Hartford/IBM@IBMUS
Internet e-mail: storman AT us.ibm DOT com

IBM Tivoli Storage Manager support web page:
http://www.ibm.com/support/entry/portal/Overview/Software/Tivoli/Tivoli_Storage_Manager


The only dumb question is the one that goes unasked.
The command line is your friend.
"Good enough" is the enemy of excellence.

"ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu> wrote on 2010-06-24
12:58:05:

> From: "Sheppard, Sam" <SSheppard AT SDDPC DOT ORG>
> To: ADSM-L AT vm.marist DOT edu
> Date: 2010-06-24 12:57
> Subject: ANE49xx messages
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
> I noticed several new messages have started appearing in the stats
> at the end of scheduled backups (we're at TSM 6.1.3.4).  One of
> these is as follows:
>
> ANE4976I (Session: 705601, Node: VMCMSATTY)  Total data reduction
>  ratio:           98.86%(SESSION: 705601)
>
> It seems several of these new ANE49xx messages are not documented
> and there is an informational apar to this effect on the support
> site (IC68698), however nowhere does it say what this statistic
> might mean.  Anyone care to hazard a guess.  We are not using
> compression or dedup.
>
> Thanks
> Sam Sheppard
> San Diego Data Processing Corp.
> (858)-581-9668