May 2018
Intermediate to advanced
576 pages
30h 25m
English
To perform a differential physical backup, you can use rsync to compare the existing files against the previous full backup, and then overwrite only the changed data blocks. It's a bad plan to overwrite your last backup because, if the new backup fails, you are left without backups. Therefore, keep two or more copies. An example backup schedule can be as follows:
| Day of the week | Backup set 1 | Backup set 2 |
|
Sunday |
New full backup to set 1 |
New full backup to set 2 |
|
Monday |
Differential to set 1 |
Differential to set 2 |
|
Tuesday |
Differential to set 1 |
Differential to set 2 |
|
Wednesday |
Differential to set 1 |
Differential to set 2 |
|
Thursday |
Differential to set 1 |
Differential to set 2 |
|
Friday |
Differential ... |