What are full backup, incremental backup, and differential backup?

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 What are full backup, incremental backup, and differential backup 

  1. Full Backup: A full backup, also known as a complete backup, is a type of backup that copies all the data in a system or a specific set of files and folders to a backup storage location. It creates an exact replica of the data at the time of the backup, regardless of whether the data has changed since the last backup. Full backups are comprehensive and provide a baseline for data recovery. However, they consume a significant amount of storage space and take longer to complete compared to other backup methods.

  2. Incremental Backup: Incremental backup is a backup strategy that only copies data that has changed or been created since the last backup, whether it was a full backup or an incremental backup. It saves storage space and reduces the time required for backup because it doesn't duplicate unchanged data. Incremental backups are typically faster and consume less storage space than full backups. To restore data from an incremental backup, you would need the last full backup and all the subsequent incremental backups in the correct order.

Here's how an incremental backup works:

  1. A full backup is created initially, capturing all data.

  2. Subsequent backups only include the data that has changed or been created since the last backup.

  3. Each incremental backup is dependent on the previous one to restore data fully.

Differential Backup:
 A differential backup is similar to an incremental backup in that it captures data that has changed since the last full backup. However, unlike incremental backups, which only include changes since the last backup (whether full or incremental), a differential backup includes all changes made since the last full backup. In other words, a differential backup accumulates changes from the last full backup forward but doesn't depend on previous differential backups.

Here's how a differential backup works:

  1. A full backup is created initially, capturing all data.

  2. Subsequent backups only include the data that has changed since the last full backup, not considering previous differential backups.

  3. To restore data, you only need the last full backup and the most recent differential backup.

Comparing the three backup types:

  1. Full backups capture all data and are self-contained but are time-consuming and consume a lot of storage space.

  2. Incremental backups are faster and require less storage space but depend on the previous backup in the chain.

  3. Differential backups accumulate changes from the last full backup, making them easier to manage compared to incrementals, but they consume more space over time.










Some Storage media

Three Types of Data Backup Summary:

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