Robert,
You need to make sure that you have enough space on your volumes that
contain the transaction logs for each Exchange storage group.
With Exchange differentials, the transaction logs are not truncated
until the next full backup. And so, you will need to make sure there
is enough space to hold all transaction logs that are created
between each full backup. Alternatively, you could use incremental
backups,
so that the logs are truncated at each incremental, but depending on
the setup of your storage pools, you may pay a small penalty at
restore time if the incremental backups are spread among different tapes.
(If you have enough disk storage pool space and the incremental backups
can
remain on disk storage pool, that is the best because from the TSM
perspective,
restoring a series of incremental backups will be very similar to
restoring
the latest differential... but you will get the added benefit on the
Exchange server transaction log volume because the logs will be
truncated more frequently. It boils down to where you want to
put your disk storage, I suppose.)
And so, there are different ways to approach this depending on your
TSM Server storage pool setup. The main thing to remember, though,
is do not let you Exchange server transaction log volumes fill up.
One other bit of information when moving to less frequent full backups...
Keep in mind that come restore time, you will have the additional
Exchange transaction log replay for the differential or incremental
backups.
The log replay will add clock time to your recovery.
Thanks,
Del
----------------------------------------------------
"ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU> wrote on 12/16/2004
02:37:05 AM:
> Hi to all
>
> I run a backup with a TDP for Microsoft Exchange server 2003
> version 5.2.1.0 on a Tsm server 5.2.3.0 , still now I backup every
> night full and during the day I made 3 incremental backup , but my
> database is growing a lot ... I am thinking of changing the backup
> to once or two full backup during the week and between 2 or 3
> differentials backup each day .
>
> Did I need to be aware of something special as my space on my
> Exchange server because the log's will not be erase till the full
> backup or something else ?????
>
> T.I.A Regards
> Robert Ouzen
> E-mail: rouzen AT univ.haifa.ac DOT il
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