Help Center/ Volume Backup Service/ FAQs/ What Are Full Backup and Incremental Backup?

Updated on 2022-02-22 GMT+08:00

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What Are Full Backup and Incremental Backup?

After an initial full backup, an ECS continues to be backed up incrementally by default.

The initial full backup covers data on every disk of the ECS. If a 100 GB disk contains 40 GB data, the initial backup consumes 40 GB backup space.
Subsequent incremental backup backs up data changed since the last backup. If 5 GB data is changed since the last backup, only the 5 GB changed data will be backed up.

VBS allows you to use any backup (no matter it is a full or incremental one) to restore the data of the entire EVS disk. By virtue of this, manual or automatic deletion of a backup will not affect the restoration function.

Suppose EVS disk X has backups A, B, and C (in time sequence) and every backup involves data changes. If backup B is deleted, you can still use backup A or C to restore data.

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