Hi to all

I have an environment for my Exchange as:


·         2 servers with exchange 2010

·         O.S Windows 2008R2 64B

·         TSM client version  7.1.1

·         TSM TDP for exchange version  7.1.0

·         TSM server version 7.1.1

I backup those exchange server with DAG configuration  ( only one filesystem) 
with the configuration of proxy as:

Target Node         Agent Node
---------------     ---------------------------------------------
EXCHSRVAN_DB        EXCHSRVA
EXCHSRVBN_DB        EXCHSRVB
DAG_EXCHANGE        EXCHSRVA EXCHSRVAN_DB EXCHSRVB EXCHSRVBN_DB

All the databases’ are configure on each server as half active and passive and 
vice versa.

I run every day 3 logs backups and one a week a full backup for each server 
with those commands:

Logs:

start /B tdpexcc backup * incr /MIN=60  /EXCLUDEDAGPASsive /SKIPINTEGRITYCHECK 
/tsmoptfile=dsm.opt  /DAGNODE=DAG_EXCHANGE  /logfile=excsch.log >> excincr.log

Full:

start /B tdpexcc backup * full /MIN=60 /EXCLUDEDAGPASsive /SKIPINTEGRITYCHECK 
/tsmoptfile=dsm.opt  /DAGNODE=DAG_EXCHANGE   /logfile=excsch.log >> excfull.log


I understand via documentation that  DP/Exchange does not actually truncate the 
logs, the Exchange Server does the actual truncation.

When a DP/Exchange backup completes successfully, it will tell the Exchange 
Server that it has stored the backup and that it can truncate the logs.

At that point, the Exchange Server decides on the appropriate time to truncate 
the logs.



So if one or more of my DB log  got full I need first to increase the space on 
each server  and only after it to run a log or full backup of this specific DB  
to clean the logs?



It’s a parameter /PREFERDAGPAS that I don’t quite understand the purpose and if 
I need it on the commands ? Any other suggestions will be appreciate too.



Best Regards



Robert Ouzen