Is anybody using Adaptive Subfile Backup?

Moebius

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PREDATAR Control23

Greetings,

due to the need of backing up a Windows server through a slow link I am investingating the possibility of performing Adaptive Subfile backups.

An IBM document dated 2005 says that the max file size for subfile backups is 2 GB. Is this still valid? In this case the subfile option would be useless to me.

Furthermore, the BA client user guide says that "the subfilebackup option does not work correctly for migrated files. If you use a combination of subfilebackup and non-subfilebackup for migrated files, your data might be corrupted on the server." This is an obscure, yet very disturbing, statement. What does it mean exactly?

I did a search on this forum, but it seems that all questions about adaptive subfile backup remained unanswered.
Is anybody using this option? Can he report his/her experience?

Thanks,
Lucio
 
PREDATAR Control23

Could you tell me where can I download the IBM document you mention on your post?
 
PREDATAR Control23

Regarding the max file size.

File size limit criteria for adaptive subfile backup
http://www-01.ibm.com/support/docview.wss?uid=swg21157331

Is this still valid?

Yes, this is still valid for TSM B/A Clients from 5.x to 7.x .
Possibly beyond 7.x

From the TSM B/A Client manual -
http://www-01.ibm.com/support/knowl...client.doc/c_opt_exclude_adaptivesubfile.html

If you are using something like HSM to migrate files.
Don't use the subfile feature to backup the migrated files and non-migrated files.

Good Luck,
Sias
 
PREDATAR Control23

Adaptive subfile backups may still be valid, but I would say that this function has been superseded by client-side deduplication.
Client-side deduplication gets better with every release, but not so adaptive subfile backup.
Bart
 
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