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Differential
Backup
A differential backup generation contains all the files that have changed since the last full backup.
This is in contrast to incremental backup generation,
which holds all the files that were modified since the last full or incremental backup.
Comparing
with full backup, differential backup is obviously faster and more economical in using the backup space, as only the files that have changed since the last full backup are saved.
Restoring from a differential backup is a two-step operation: Restoring from the last full backup; and then restoring the appropriate differential backup.
The downside to using differential backup is that
each differential backup will probably include files that were already included in earlier differential backups.
However,
since RRB can
restore any backup generation in a single session, there is no point in using differential backup.
Tutorial Index
Next: Incremental Backup
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