Hi Steve,

With Exchange 2010, especially when set up in a Database
Availability Group (DAG), the log truncation can be "delayed"
because Exchange must make sure all log updates are sent and
committed in all copies (active and passive) before it
truncates the logs. A backup product (like TSM) completes a
full backup and reports the backup is successful to Exchange.
It is then the responsibility of Exchange to perform the
actual log file truncation. You should see evidence of this
notification to truncate logs in the Windows Event log.

We have seen cases when Exchange is still failing to
truncate logs. In those cases, customers have needed to
engage Microsoft support to find what is preventing Exchange
from performing the log truncation.

Thanks,

Del

----------------------------------------------------


"ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu> wrote on 07/08/2013
09:42:04 AM:

> From: "Schaub, Steve" <steve_schaub AT BCBST DOT COM>
> To: ADSM-L AT vm.marist DOT edu,
> Date: 07/08/2013 09:42 AM
> Subject: TDP for Exchange2010 6.4.0.0 Incremental backups not truncating
logs
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
>
> Tsm server 6.2.4.0
> Tsm client 6.4.0.0
> Tdp client 6.4.0.0
>
> I have powershell scripts running our full & incremental Exchange
> 2010 backups.
> The full backups truncate the logs, but the incremental do not.
> I've read through the doc and googled, but haven't found any reason.
> Nothing obvious showing up in the app logs.
> Any help would be appreciated.
>
> Here are the pertinent commands/files:
>
> incremental backup command:
> & .\TDPEXCC BACKUP * INCREMENTAL /PreferDAGPassive /
> MinimumBackupInterval=10 /SkipIntegrityCheck /DAGNode=EXCHANGE2010 /
> BackupMethod=VSS /BackupDestination=TSM /LogFile=$myTsmSchedLog >
$myTempFile
>
> results:
> VSS Backup operation completed with rc = 0
>    Files Examined                   : 3530
>    Files Completed                  : 3530
>    Files Failed                     : 0
>    Files Deduplicated               : 0
>    Total Bytes Inspected            : 3620460520
>    Total Bytes                      : 3622488810
>    Total LanFree Bytes              : 0
>    Total Bytes Before Deduplication : 0
>    Total Bytes After Deduplication  : 0
>    Files Compressed By              : 0%
>    Deduplication Reduction          : 0.00%
>    Total Data Reduction Ratio       : 0.00%
> The operation completed successfully. (rc = 0)
>
> dsm.opt:
> *====================================================================
> * Tivoli Storage Manager - BCBST Win Servers TDP Exchange Clients
> *    Installed Fri 04/19/2013 11:30:58.60
> *====================================================================
> *====================================================================
> * Identification Section
> *====================================================================
> nodename               xxxxxxxx_MAIL
> tcpserveraddress       xxxxxxxx.bcbst.com
> tcpport                5002
> tcpclientaddress       xxxxxxxx.bcbst.com
> tcpclientport          1510
> tcpcadaddress          localhost
> tcpclientport          1510
> HTTPport               1581
> webports               1503,1504
> *====================================================================
> * TCP/IP Section
> *====================================================================
> commmethod             TCPIP
> tcpbuffsize            512
> tcpwindowsize          1024
> diskbuffsize           32
> *====================================================================
> * CAD/Schedule Settings Section
> *====================================================================
> managedservices        schedule
> errorlogretention      90
> schedlogretention      14
> schedmode              polling
> queryschedperiod       1
> *====================================================================
> * Misc Section
> *====================================================================
> clusternode            no
> passwordaccess         Generate
>
>
> tdpexc.cfg:
> *********************************************************************
> * IBM Tivoli Storage Manager for Mail
> * Data Protection for Exchange Configuration File
> *********************************************************************
> LogFile                  tdpsched.log
> LogPrune                 90
> MountWaitForData         Yes
> MountWait                Yes
> BackupMethod             VSS
> TempLogRestorePath       F:\tdp-temp
> TempDBRestorePath        F:\tdp-temp
> MailboxRestoreUnread     No
> StoreMailboxInfo         NO
> Retries                  4
> SkipIntegrityCheck       YES
> Language                 ENU
> BackupDestination        TSM
> LocalDSMAgentNode        xxxxxxxx
> DAGNode                  EXCHANGE2010
> ImportVSSSnapshotsOnlyWhenNeeded  NO
> VSSPOLICY * * INCREMENTAL TSM EXCHANGE_LOGS
> VSSPOLICY * * FULL        TSM EXCHANGE_DB