Backup and Recovery
In this part we want to know, what is Backup and Recovery? Backup refers to storing information in external memory to protect information from accidents and loss. Recovery refers to returning data from a saved copy to the original location or to an alternate location where information has been lost or damaged.
To store information, we use a separate system or media such as virtual hard drives, data storage servers or cloud storage space to protect them against the possibility of data damage.
Why do we need backups?
Why do we need backups? By making a backup copy, we make a copy of the information in a peripheral memory so that we can recover it in case of damage to the primary data. Primary data failures usually occur for the following reasons:
- Hardware defect
- Defect in the software
- Corruption of information
- Human error – accidental deletion of data
- Attack of viruses or malware
by having a backup copy of the data, we can restore it from the initial point in time.
Having a copy of information in an external space is very vital and necessary to prevent information loss. This additional copy can be, for example, an external hard drive or a USB memory or a disk storage system or Cloud storage:
- The source device (a workstation),
- Your local backup device (External HDD),
- Off-site location (Cloud backup solution).
Backup solutions:
- File-only backup,
- Server backup,
- Desktop backup
Backup methods:
There are two general methods for backup:
1. Field or traditional method:
Data is serially backed up using a backup server or software. The backend server retrieves the data and indexes, compresses, and encrypts the data for optimization and easy search before sending it.
2. Array-based method:
This backup method is based on array. The way this method works is based on Snapshots, which provides an alternative for data protection.
The advantages of this method include:
-
- High performance on personal memories
- Low pressure on memory
- Higher service level to provide more backup copies
- Productivity and high efficiency of stored data
- Easier and faster use of data alignment
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