Types of Database Backup for Database Management System

Types of Database Backup for Database Management System

Toy Story is one of the most popular animated franchises of all time. Many fans of this series are unaware that Toy Story 2 almost never happened. Back in 1998, during the making of the film, a staff member by Pixar accidentally entered a command to remove from the drive where the movie files were stored.

All files in the drive have been permanently deleted. Unfortunately for Pixar, their database backup plan failed, and therefore no continuous copy of the film was stored on their servers. Their saving grace was the film’s technical director, who had just had a baby and was working on the film at home. He would take a copy of all the film files at home each week, to save the film.

Disasters and imminent disasters like Strong happen all the time in the business world. Data loss can be a major problem and, in some cases, can lead to the business being completely shut down. Strong’s experience underscores an important factor in data backup — not enough to have a backup system. That system needs to be tested to be reliable when needed.

What is database backup?

Data backup is a way to protect and restore the database. It is done using data duplication and can be done with a database or data server. Usually, data backup is done by RDBMS or similar data management software. Domain administrators can use a backup copy of data to restore the database to its working state and its data and logs. Backup data can be stored locally or on a backup server.

Types of Database backup

Full backup

As the name implies, a full backup is a type of database backup which is when all files and folders in the system are backed up. A full backup takes longer and requires more space than other types of backups, but the process of recovering lost data from a backup is much faster.

Incremental backup

With incremental backup, only the first full backup is complete. The following backups only save the changes made from the previous backup. The process of recovering lost data from backup is long, but the backup process is much faster.

Differential backup

Different backups are the same as doing more backups. So both, initial backup is complete, and follow-up backups only save changes made to files from the last end. This type of backup requires more storage space than can be done with additional support, but also allows for faster recovery time.

Mirror backup

Screen saver, as the name implies, is the direct copy of source data. The advantage of screen backup as opposed to a full backup, mounting, or alternative database backup, is that you don’t keep old, obsolete files. When the expired files are deleted, they disappear from the backup of the screen as the system reverses. A bad backup detection is that if files are accidentally deleted, they can be lost from backup properly if the deletion is not available before the next scheduled backup.

File backup

Another way to back up your information is to use “File” backups. This allows you to backup each file independently instead of backing up the entire database. This only works if you have created multiple data files for your data. One reason for this type of backup is that if you have very large files, you can back them up individually.

For the most part, you may have one data file, so this option does not work. As mentioned above, you can back up each data file. If you have a very large database and have large data files, this option may work.

Filegroup Database

In addition to backup “File,” you can also backup “Filegroup,” which lets you back up all files in a specific filegroup. By default, each database has a PRIMARY filegroup tied to a single generated data file. You have the option to create additional file groups and add new data files to any filegroup. In most cases, you will probably only have an Advanced filegroup, so this title does not work.

As mentioned above, you can support each file group individually. One advantage of using group file backups over file backups is that you can create a read-only filegroup which means the data will not change. So instead of backing up the entire database all the time, you can just back up the Read-Write filegroups.

Transactional Database

If your database is set to the “Full” or “Bulk-logged” recovery model, then you will be able to extract the “Transaction Log” backups. By having transaction log logs and full backups, you have the ability to make a point in retrieving time, so if someone accidentally deletes all data from the database, you can restore the database to the point in time before deleting happens. The only warning for this is that if your database is set to the “Bulk-logged” recovery model and the bulk operation is removed, you will need to retrieve the entire transaction log, so you will not make a point during retrieval using the transaction log backup that contains bulk performance.

Conclusion

In a nutshell, database backup is important in protecting your files from loss or destruction. It can also be a great way to upload your photos and videos to another computer. Fortunately, nowadays, buying a storage device is easier than ever. They are available online and in many major retailers. The price is usually reasonable and is determined by the amount of data you need to keep.