Hello everyone, in this video we are going to talk about different types of backups. Error long-suffering can now be defined as preventing data loss as an element neglects. But as blame endurance miscarried, calamity improvement is our last option. Disaster recuperation is now the process of rebuilding an organization’s data after a disaster pass, such as data loss. So, even if we have fault tolerance, we still need to back up our data. And there are three different types of backups: there are complete, incremental and differential. In this proof I’m going to use the old-fashioned tape backup as our storage device. Although tire backup is fading, some organizations are still working it. Whether you have a backup on acquire tape or disc, it does not matter; the backup approaches I discuss apply to all memory device. So let’s talk about a full backup first. Now a full backup is merely a the identify advocates, it’s a complete backup. It therefore makes a backup of all the data. So in our sample all the data is simply merged into one stripe backed up.As you have been able predicted, this is the simplest form of backup to perform, because simply one party is applied. However, if you have a large amount of data, is the execution of a full backup daily is not efficient because the disadvantage of the terminated backup is that it takes the longest to perform. But full backup has’ an advantage and this is during data retrieval, because if you ever wanted to recover the data, the data can be recovered in one session. So, in our precedent, the data becomes in one strap backed up, and the single videotape is all you need for data recovery, so the data recovery is very simple. An incremental backup is now much faster than a full backup backup, because in an incremental backup, the only data that is backed up is the data that has changed since the last full or incremental backup.For pattern, let’s say a company Make a full backup on Monday and do incremental backups from Tuesday to Friday. So, the only data backed up is that the data has changed since the last full or incremental backup. So Tuesday merely makes a backup of Tuesday’s data, Wednesday simply makes a backup of Wednesday’s data, Thursday will merely back up Thursday’s data, and so on. As you can see in this illustration, utter each backup videotape backs up only the data varied for that weekday. The advantage of an incremental backup is therefore that it is the fastest backup compared to a full or differential backup. Nonetheless, the downside of an incremental backup is that it makes the longest when you need the data recover, because when you need to restore the data after performing an incremental backup, you reinstate the full backup together with the incremental backup, and you need to restore the incremental in the same order as you backed it up.Here we have, for example, a complete backup tire and a week’s incremental backup. To recover the data, you are required ended the backup videotape fixing, and then you need to install the incremental from Tuesday to Friday in restore the rectify say. And once that is done, you have a complete data recovery for that week. So you are eligible to clearly discover why an incremental retrieval takes much longer to perform. Now a differential backup faster than a full backup, but it’s not as fast as an incremental backup. Now, in a differential backup, the data backed up is the data that has changed since the last full backup. If I go back to our speciman here, a company does a full backup on Monday and does them differently backup Tuesday through Friday. As the data on those weekdays is added to the database, the differential backup the data backup that has changed since Monday’s full backup.Therefore will back up Tuesday’s data on Tuesday. Wednesday, the data from Tuesday and Wednesday make a backup. On Thursday, the data of Tuesday, Wednesday and Thursday will be made. And Friday performs the data of Tuesday, Wednesday, Thursday and Friday a backup. As you can see in this illustration, simulate each backup videotape data is not simply from their own day but likewise from the previous weekdays since the last full backup was performed. Now, after a differential backup, you would first need the data had to fixing, you would only need the last full backup and the last differential backup to perfectly recover your data. If, for example, the event of accidents followed over the weekend and you need to restore the data, you are able to recover the full backup from Monday and then the Friday’s differential backup will recover, and once you’ve done, your data will. So here is a final synopsi and a similarity of the three types of backups. To start with a terminated backup, a complete backup simply makes a backup of all the data, but it takes the longest to execute. And when it comes to data recovery, the only backup that needs to be restored is the full backup. And since it exclusively needs the full backup to recover the data, the improvement process is the fastest. And an incremental backup makes a backup of the data that has is to be found since the last ended or incremental backup has been changed. And it’s the fastest backup of the three, because it’s just the data backed up for that day change. But during a data convalescence, it makes the longest to perform because there is a requirement recover the full backup, along with the incremental backup, and there is a requirement reinstate the incremental rebuild in the same order as you backed it up. A differential backup forms a backup of the data which has changed since the last full backup. A differential backup is faster than a full backup, but it is slower than an incremental backup. And as far as data recovery is concerned, a differential improvement is needed the full backup and the last differential backup, and the retrieval procedure is in the middle. The convalescence is faster than an incremental recuperation, but it is slower than a full recovery you.
