Scale Out Backup and Restore (SOBAR)

Scale Out Backup and Restore (SOBAR) is a specialized mechanism for data protection against disaster only for GPFS™ file systems that are managed by IBM Spectrum Protect™ for Space Management.

Note: This feature is available with IBM Spectrum Scale™ Standard Edition or higher.

To protect a file system against disaster the following steps must be taken to ensure all data is safely stored in a second location:

Record the file system configuration with the mmbackupconfig command.
Ensure all file data is pre-migrated (see Pre-migrating files with external storage pools for more information).
Perform a metadata image backup with the mmimgbackup command.

The mmbackupconfig command must be run prior to running the mmimgbackup command. No changes to file system configuration, filesets, quotas, or other settings should be done between running the mmbackupconfig command and the mmimgbackup command. To recover from a disaster, the mmrestoreconfig command must be run prior to running the mmimgrestore command. The file system being restored must have the same inode size and metadata block size as the file system that was backed up. Use the mmrestoreconfig -F QueryResultFile option to create the QueryResultFile. Use the example of the mmcrfs command within the QueryResultFile to recreate your file system. After restoring the image data and adjusting quota settings, the file system can be mounted read-write, and the HSM system re-enabled to permit file data recall. Users may be permitted to access the file system, and/or the system administrator can manually recall file data with the IBM Spectrum Protect for Space Management command dsmrecall.

These commands cannot be run from a Windows node.