MartyMcFly
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I have installed TDP for SAP on several machines and activated deduplication on the target storage pool (sequential file class).
I have configured the backup with one thread, diabled multiplexing and compression, set deuplication to server side.
RDBMS is Oracle 11g, Unicode , SAP is ERP 6.0 on all machines.
I tested each machine in a seperate storage pool.
The backup from Windows machines deduplicate very well. 3 full backups with 300 GB each needed 305 GB space on the TSM, 66% dedup ratio, that is, what i expected.
Backup from AIX 6.1 machines had a dedup-ratio of only 13%, after 3 full backups with 300 GB each, it reports 790 GB utilisation on the the TSM.
Do you have any idea why this happens? From my point of view, a tablespace file which is not changed between two backups should get fully deduplicated.
Thanks for any hint
Marty
I have configured the backup with one thread, diabled multiplexing and compression, set deuplication to server side.
RDBMS is Oracle 11g, Unicode , SAP is ERP 6.0 on all machines.
I tested each machine in a seperate storage pool.
The backup from Windows machines deduplicate very well. 3 full backups with 300 GB each needed 305 GB space on the TSM, 66% dedup ratio, that is, what i expected.
Backup from AIX 6.1 machines had a dedup-ratio of only 13%, after 3 full backups with 300 GB each, it reports 790 GB utilisation on the the TSM.
Do you have any idea why this happens? From my point of view, a tablespace file which is not changed between two backups should get fully deduplicated.
Thanks for any hint
Marty
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