Learn About Differential And Incremental Backups
It is good to familiarize yourself with the different backup types available if you are trying to compare systems to decide which is right for your needs. These backup systems include full backups, differential backups and incremental backups. Explanations of all of these backup systems are outlined below including suggestions regarding backup combinations that can work out well.
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A full backup is always required as a first step in any backup system. A full backup means that every data file in your system is backed up onto a disk or server. The drawback of full backups is the time is takes to complete them however, there is no way around this.
A backup system that backs up only the data that has changed in the time that has passed since the previous backup was done is called a differential backup. To illustrate how this works, imagine that your data was fully backed up on Thursday, when the following day’s scheduled backup starts on Friday, it will only backup new data that was created between the time the Thursday’s backup was completed and Friday’s backup started. The benefit of this kind of backup system is that when you do a complete restore of your data only the last differential backup needs to be restored which saves a lot of time.
By contrast, a backup system which saves multiple backups is called an incremental backup. Contrary to a differential backup, an incremental backup does not only save the last one. Each original set of data that is backed up gets stored once. Subsequent backups are comprised of only the data that changed in the time between the current and previous backup.
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It is a good idea to narrow down how you use or combine these different backup systems and only use one of the following combinations. The first choice isn’t a combination but rather the old fashioned backing up of all your data each time regardles of what has changed or not. You do full backups plus incremental backups. This means you do a full backup periodically but do incremental backups regularly. Lastly, you can choose to perform periodic full backups combined with regular differential backups. As mentioned, differential backup technology saves only the data that changed during the time frame between your previous full data backup and the differential backup you are performing currently.
Remember and familiarize yourself with the different backup types which include full, differential and also incremental backups. A full backup is time consuming but a mandatory part of any type of data backup plan. A differential backup is a method that only backs up data that has changed since your last backup. Lastly, an incremental backup saves multiple backups and not only the last one. It is quite possible to benefit from the best aspects of each backup system by selecting a combination of the different systems as was explained earlier in this aritcle.
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