|
As the need for system availability increases, especially in 24-hour operations, the backup "window" must decrease to prevent data from changing while being backed up. Backing up "live" data can cause erroneous or partially-updated files after such data is restored from a backup. This is particularly problematic with databases, which typically have relational data that must be kept in sync.
SBAdmin includes the ability to perform a snap-shot, or point-in-time backup of any live data contained in Logical Volumes. Logical volumes are software storage devices used exclusively on AIX systems and quickly becoming a standard installation storage configuration on Linux systems. Logical volumes are created by the Logical Volume Manager (LVM) package.
SBAdmin peforms snap-shot backups by backing up an offline copy of all data in the logical volumes. This allows users to continue to access and modify data in the online copy, while the backup includes all data as it was wen the backup process started. This ensures the relational data, when restored, is all at the same point-in-time, no matter how long the backup takes.
SBAdmin uses a Split-Mirror-Backup process on AIX systems to capture data from an offline copy of a mirrored logical volume, and on Linux systems it uses the Snapshot Logical Volumes.
Since the snapshot backups are performed on any data residing in logical volumes, including raw databases and filesystem data, any and all data, even on a full system backup, may be captured.
|
