Hi Wanda,

This is what gives you the "load balancing" for backups
when you have multiple Exchange servers that are working together
to perform a backup on a set up DAG databases.
By having separate invocations, each of the Exchange servers
will perform a backup of a database, then move on to the next one,
checking to see if a backup has been performed within the
"minimumbackupinterval", if it has, it is skipped, if not,
it backs it up.

Del

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

"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 11/10/2014
10:46:49 PM:

> From: "Prather, Wanda" <Wanda.Prather AT ICFI DOT COM>
> To: ADSM-L AT VM.MARIST DOT EDU
> Date: 11/10/2014 10:48 PM
> Subject: Re: exchange 2010
> Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
>
> Del,
> Can you elaborate a little more?
> How is the separate invocation as you showed below different from doing
>    TDPEXCC BACKUP * FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>
> ?
> Thanks
> Wanda
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On
> Behalf Of Del Hoobler
> Sent: Thursday, October 30, 2014 3:49 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] exchange 2010
>
> Hi Remco,
>
> The PREFERDAGPASSIVE tells DP/Exchange to only back up an active
> database if there are no current healthy passive copies of the
> database. If no healthy passive copy is available, the backup is
> made from the active copy.
>
> Most of the DAG backup best practices and methodology is in the
> Exchange book under "Database Availability Group (DAG) backups":
>
>
> http://www-01.ibm.com/support/knowledgecenter/SSTG2D_7.1.1/
> com.ibm.itsm.mail.exc.doc/c_dpfcm_bup_replica_exc.html?lang=en
>
>
> The key to "load balance" when setting up the scheduled backup
> script is to have a separate invocation of each database.
>
> For example:
>
>    TDPEXCC BACKUP DB1 FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>    TDPEXCC BACKUP DB2 FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>    TDPEXCC BACKUP DB3 FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>    TDPEXCC BACKUP DB4 FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>    TDPEXCC BACKUP DB5 FULL /MINIMUMBACKUPINTERVAL=720 /PREFERDAGPASSIVE
>
> Then, run this command from each of the Exchange servers at or about
> the same time.
>
>
>
> Del
>
> ----------------------------------------------------
>
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 10/30/2014
> 02:42:01 PM:
>
> > From: Remco Post <r.post AT PLCS DOT NL>
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Date: 10/30/2014 02:42 PM
> > Subject: exchange 2010
> > Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> >
> > Hi All,
> >
> > we're sort of struggling to get the full backups of our exchange
> > environment completed. The good news is that the mail admins have
> > decided to split the exchange env. into many small databases, so I was

> > thinking to create a script that backups a number of databases full
> > and the rest incrementally and rotating the selection of databases to
> > be backed up fully each day.
> >
> > I was just wondering about the preferdagpassive parameter. If I say
> > 'backup db1,db2,db3,db4 full /preferdagpasive' and db3 and db4 are
> > active databases on this DAG node, will they or will they not be
> > backed up? In other words, is there a difference in handling for * vs.

> > explicitly naming the databases to be backed up?
> >
> > (of course I'll run the exact same command on the other DAG node at
> > more or less the same time to backup those databases that are passive
> > over there).
> >
> > --
> >
> >  Met vriendelijke groeten/Kind Regards,
> >
> > Remco Post
> > r.post AT plcs DOT nl
> > +31 6 248 21 622
> >
>