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Difference between Incremental and Differential back up

Difference between Incremental and Differential back up

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Accepted Solution!

NetBackup has two kinds of

NetBackup has two kinds of Incremental Backups:

Cumulative Incremental:
This will backup all changes this the last Full backup.

Differential Incremental:
This will backup all changes since last backup - Full or Incremental.

See this diagram:

View solution in original post

8 Replies
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An Incremental backup backs

An Incremental backup backs up only the selected files that have their archive bit set to ON, setting them back to OFF. This results in a backup of all files that are new or changed since the last backup, whether it was a full or an incremental. The advantage of an Incremental is that it takes the least amount of time and media of all the backup methods.

A Differential backup backs up only the selected files that have their archive bit set to ON but does not set the archive bit back to OFF. A Differential backup will back up all selected files that are new and changed since the last full backup. The advantage of a Differential comes at restore time; you'll need only the last full backup and the last differential to get a complete restore. In the case of restoring with Incremental backups, all the Incremental backups since the last full backup plus the last full backup would be necessary.

http://www.symantec.com/business/support/index?page=content&id=TECH7665

hi added some more you can

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Accepted Solution!

NetBackup has two kinds of

NetBackup has two kinds of Incremental Backups:

Cumulative Incremental:
This will backup all changes this the last Full backup.

Differential Incremental:
This will backup all changes since last backup - Full or Incremental.

See this diagram:

View solution in original post

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That information is from BackupExec

Since this question was asked in a NetBackup forum, we need to provide NetBackup specific information. The link and information you provided concerns BackupExec.

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That link is of a different company

Since this information was asked in a NetBackup forum, we need to provide NetBackup specific information, instead of providing a link to information from a different company (Acronis), who may or may not have a different way of doing backups.

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thanks everyone.

thanks everyone.

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Re: An Incremental backup backs

***Below Statements are Wrong:- 

 

An Incremental backup

This results in a backup of all files that are new or changed since the last backup, whether it was a full or an incremental.

 

Differential backup

A Differential backup will back up all selected files that are new and changed since the last full backup.

 

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Re: An Incremental backup backs

@Venkatesh1

The definitions in my post above (marked as Solution)  are correct. 

See this extract from NBU Admin Guide I:
https://www.veritas.com/support/en_US/doc/18716246-126559472-0/v41779991-126559472