See page 286 in the AIX admin guide
Quote:
Attention: By default, the Tivoli Storage Manager server requires that
you back
up deduplication-enabled primary storage pools before volumes in the
storage
pool are reclaimed and before duplicate data is discarded. The copy
storage pools
and active-data pools to which you back up data and copy active data
must not be
set up for data deduplication. To prevent possible data loss, do not
change the
default. If you do change the default, reclamation criteria remains
unchanged
...
...
Attention: You can change the default setting to permit reclamation of
primary
storage pools that are not backed up. However, there is a remote
possibility that
changing the default can result in unrecoverable data loss if a
data-integrity error
occurs. To change the default and permit reclamation of primary
sequential-access
storage pools that are not backed up, set the value of the
DEDUPREQUIRESBACKUP server option to NO. Changing the default does not
change the reclamation criteria that you specified for a storage pool.
The DEDUPREQUIRESBACKUP server option applies only to primary storage
pools. The option does not apply to copy storage pools or active-data
pools.
Cheers,
Thank you,
Neil Strand
Storage Engineer - Legg Mason
Baltimore, MD.
(410) 580-7491
Whatever you can do or believe you can, begin it.
Boldness has genius, power and magic.
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Alexander Heindl
Sent: Wednesday, September 07, 2011 11:19 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] confused about deduprequiresbackup
Hi,
I'm a bit confused about this option.
when I set it to no, reclamation on my primary dedup filepool works
when set to yes, not. although all data is copied to a copypool.
reclamaion on copypool works in both situations...
could it have to do with the fact that the copypool is also file device
(on a share) with deduplication activated?
Regards,
Alex Heindl
IMPORTANT: E-mail sent through the Internet is not secure. Legg Mason
therefore recommends that you do not send any confidential or sensitive
information to us via electronic mail, including social security numbers,
account numbers, or personal identification numbers. Delivery, and or timely
delivery of Internet mail is not guaranteed. Legg Mason therefore recommends
that you do not send time sensitive
or action-oriented messages to us via electronic mail.
This message is intended for the addressee only and may contain privileged or
confidential information. Unless you are the intended recipient, you may not
use, copy or disclose to anyone any information contained in this message. If
you have received this message in error, please notify the author by replying
to this message and then kindly delete the message. Thank you.
|
