Job modes and their I/O impact
For a generic overview for I/O impact of the backup modes, please see this table:
| Method | I/O impact on destination storage |
|---|---|
| Forward incremental | 1 x write I/O for incremental backup size |
| Forward incremental, active full | 1 x write I/O for total full backup size |
| Forward incremental, transform | 2 x I/O (1x read, 1x write) for incremental backup size |
| Forward incremental, synthetic full | 2 x I/O (1x read, 1x write) for entire backup chain |
| Reversed incremental | 3 x I/O (1x read, 2x write) for incremental backup size |
| Synthetic full with transform to rollbacks | 4 x I/O (2x read, 2x write) for entire backup chain |
For more details on Job modes and I/O, please review the best practice information located here:
https://bp.veeam.com/vbr/VBP/4_Operations/O_Veeam_Jobs/O_backup_jobs/backup_job_methods.html