diferentiaalvarukoopiaga

Diferentsiaalvarukoopiaga, often translated as differential backup, is a type of data backup strategy. Unlike a full backup, which copies all selected data every time, a differential backup only copies the files that have changed since the last full backup. This significantly reduces the time and storage space required for subsequent backups.

The process begins with an initial full backup of all data. Following this, each differential backup captures all modifications and additions made to the data from the point of the last full backup. To restore data from a differential backup, both the last full backup and the most recent differential backup are needed. If a file was changed multiple times after the full backup, only the latest version captured by the differential backup is relevant for restoration.

The advantage of differential backups lies in their efficiency compared to frequent full backups. However, they consume more space and take longer to perform than incremental backups, which only back up changes since the *previous* backup, whether it was a full or another incremental backup. Restoring from a differential strategy requires fewer backup sets than an incremental strategy, but the size of the differential backup set grows over time until the next full backup is performed. This method offers a balance between backup speed, storage utilization, and restore complexity.

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