A backup method that backs up only the data changed since the previous backup, whether full or incremental. Each backup is small and quick, but a restore requires restoring the full backup and then applying every incremental backup after it in order.
Japanese name: 増分バックアップ
Incremental backup appears in 2 practice questions across 1 topic, including System Architecture and Reliability.
Answer: C. 4
An incremental backup contains only the changes since the previous backup, so after restoring Sunday's full backup, the incremental backups of Monday, Tuesday and Wednesday must be applied in order. The number of backups used is therefore 1 + 3 = 4. Two would be enough if differential backups were taken every night (the full backup and Wednesday's differential backup).
An incremental backup contains only the changes since the previous backup, so after restoring Sunday's full backup, the incremental backups of Monday, Tuesday and Wednesday must be applied in order.
A full backup is taken every Sunday night, and an increment…Backing up only the changes since the previous backup is an incremental backup; each one is small, but a restore needs the full backup and every incremental backup after it.
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Differential backup Dual system Duplex system Fail-safe Fail-soft Fault tolerance Fool-proof Hot standby Load balancer RAID