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All AIX systems use the Logical Volume Manager (LVM) for storing all data. Logical volumes may be mirrored, keeping a separate up-to-date copy of all data as the data is changed.
SBAdmin will allow you to configure split-mirror backups, which will break off a copy of the live data, and use the offline copy to peform the backup. This is especially useful for backing up live data such as Oracle, DB2, or MySQL databases. When the backup is complete, SBAdmin returns the mirror and syncs it up with the online copy.
LVM also allows for 2 mirrors (3 copies) of a logical, so SBAdmin can break off one copy while data and system availability is still preserved using the remaining mirrored copies.
A backup job configured to use split-mirrors, whether a specific filesystem, raw database, or the entire system, performs all the steps in splitting-off copies, backing up, and re-syncing the copies - making the process automatic and transparent to the user.
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