Thursday 28 August 2014

Types of backup methods

Full Backups
Full backup is the starting point for all other backups, and contains all the data in the folders and files that are selected to be backed up. Because full backup stores all files and folders, frequent full backups result in faster and simpler restore operations. Remember that when you choose other backup types, restore jobs may take longer.
  • This approach is good when the project includes 
  • not so large amounts of data.
Incremental Backups
An incremental backup stores all files that have changed since the last backup. The advantage of anincremental backup is that it takes the least time to complete. However, during a restore operation, eachincremental backup must be processed, which could result in a lengthy restore job.
  • This approach is good when the project includes too
  •  many files to back up them all each time. 
  • It's fast and takes less time for incremental backups. 
  • Incremental backups take less disk space.
  •  It allows you to create backups frequently. 
Differential Backups
differential backup contains all files that have changed since the Previous full backup. The advantage of adifferential backup is that it shortens restore time compared to an incremental backup. However, if you perform the differential backup too many times, the size of the differential backup might grow to be larger than the baseline full backup.
  • Is intermediate between the first two approaches.
  •  It is also good when the conditions are intermediate.
  • Each differential backup includes all the project files.
  •  changed since the last full backup.
  •  It takes less time and space than "Always Full", 
  • but more than "Full+Incremental". 
Mirror Backups


Mirror backup includes all files that have changed since the last normal (full) or mirror backup, missing files are also be deleted from the backup set. The resulting backup archive consists of either one compressed file or one folder.

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