However, the amount of space consumed by backed up data will grow with each differential backup until the next full backup.Įven though differential backups are more flexible than full backups, they still present too many obstacles for routine use, particularly as the next full backup gets closer. One of the benefits of this strategy over incremental backup is that you only need the last full backup and last differential backup to restore data, making the restoration process much faster. They are much quicker than full backups since less data is being backed up. Learn more about Datto SIRIS What is Differential Backup?ĭifferential backup strategy backs up files and folders that have changed since the last full backup, on a daily basis. Incremental vs Differential Backup - How do they compare?ĭifferential and incremental backups are different backup strategies with the same purpose: optimize backup time and space. Differential backups only back up the files that have changed since the previous full backup, while incremental backups do the same, they back up the files that have changed since the previous incremental or full backup.ĭatto SIRIS ensures reliable backups with our Inverse Chain Technology™ with fundamentally changes the way backup and recovery is done allowing for every incremental snapshot to be a fully constructed recovery point. This is the basis of smart backup strategies.
Therefore, it makes sense only to backup data that has changed on a daily basis. That’s when these two backup strategies come in hand.Īn average partition or disk only contains a small number of changes per day, or even per week. A full backup, of course, backs up all the data on a partition or disk by copying all disk sectors with data to the backup image file.Ī full backup is time-consuming and requires a lot of space, it’s usually used as part of a backup plan with long intervals, like once a week or a month. During this time, if anything goes wrong, a lot of data can be lost. In its simplest form, a full backup is the starting point for both Incremental and Differential backup strategies. However, the effectiveness of incremental backups is very different from differential backups.īefore we dive into the differences between Incremental and Differential backups let's review Full Backups.
The main difference between incremental and differential backups is how they save space and time by storing only changed files.
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