How to estimate RMAN incremental backup size using block change tracking file

(Doc ID 1938079.1)

Last updated on APRIL 26, 2017

Applies to:

Oracle Database - Enterprise Edition - Version and later
Zero Data Loss Recovery Appliance Software - Version and later
Information in this document applies to any platform.
***Checked for relevance on 7-Dec-2015***


Customer wants to estimate their incremental backup size for disk / tape storage sizing purposes. The block change tracking (BCT) file tracks which database blocks were changed since the last RMAN backup, so that RMAN incremental backups only need to read and write the changed blocks. The change tracking file data can also be used to estimate future incremental backup size.


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