Recovering before images with rollback

If you choose to recover before images, then you can also choose the rollback option.

The rollback option protects you from unintentionally overwriting changes that are outside of the set you have selected. Specifically, the rollback option ensures that the selected changes for a resource definition form an unbroken chain that begins at the current resource definition and ends at the before image of the oldest selected change. The chain is unbroken if the following two conditions are true: To match, two items must have the same attribute values and the same change date.

The following figure illustrates the concept of a rollback chain:

Figure 1. Recovering before images with the rollback option

For example, suppose you want to undo changes within a specified time period by a particular user. To avoid overwriting more recent changes, or changes by other users, use the rollback option to recover the before images.

If a resource definition was not recovered due to a break in the rollback chain, then the Prompt column for each of the selected changes for that resource definition shows "*Errors". For details of the error, enter ? next to the change.

Tip: To identify the break in the chain, enter H next to one of the changes that shows "*Errors". This displays a list panel of all historical versions of that resource definition, including any historical versions outside of the set of changes that you selected for recovery.

The rollback option applies to each resource definition individually: a break in the rollback chain of one resource definition has no effect on the recovery of other resource definitions in the set of selected changes.


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Timestamp icon Last updated: Friday, 8 February 2013


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