An incremental backup contains all changes made since the latest incremental or full backup creation. If one full backup and several incremental ones were created, all of these backups must be saved in the same folder so that you will be able to restore the data. If one of incremental backups or a full backup is deleted, there is no way to restore this backup set, since all backups are dependent on each other.
A differential backup contains all changes made since the full backup creation. To restore a differential backup, you should place it in the same folder with the full backup.
差异增量：是备份上级及同级备份以来所有变化的数据块，差异增量是默认增量备份方式
累积增量：是备份上级备份以来所有变化的块
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