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Incremental backups and retention

Discussion in 'Data Protection' started by Misiek, Nov 29, 2018.

  1. Misiek

    Misiek Well-Known Member

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    Dear All,
    I want to set my system so it holds 10 backups with full backup of first day and the rest nine is just incremental. I really tried to find in documentation how inclremental backup works but there is nothing more than they work.

    I set incremental backup with retention 5, checked for hard links but they are not there can somebody explain how to set it to make any sense

    [[email protected] ~]# du --max-depth=1 -h /home/user/
    385G /home/user/2018-11-29
    23G /home/user/2018-11-24
    23G /home/user/2018-11-27
    23G /home/user/2018-11-30
    452G /home/user/
     
    #1 Misiek, Nov 29, 2018
    Last edited: Nov 30, 2018
  2. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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  3. Misiek

    Misiek Well-Known Member

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    I created only incremental configuration, and the list of folders and sizes i attached are from only incremental backup!
     
  4. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    Hello @Misiek

    The way that incremental works though is that one initial backup needs to be full and subsequent backups store in increments any changes.
    • Incremental — Select this setting to save all of your files in the directory tree. This setting uses a combination of hard links and files for speed and to save disk space.

    Can you explain what the issue with this is?

    Thanks!
     
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  5. Misiek

    Misiek Well-Known Member

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    This is not logical
    Code:
    385G    /home/server1/2018-11-29
    12K     /home/server1/2018-12-01
    23G     /home/server1/2018-11-24
    24G     /home/server1/monthly
    23G     /home/server1/2018-11-27
    23G     /home/server1/2018-12-02
    22G     /home/server1/2018-11-30
    
    If one initial backup should be full why the full backup is with date 2018-11-29 and the earlier backup for example from 2018-11-27 are small?
     
  6. cPanelLauren

    cPanelLauren Forums Analyst II Staff Member

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    Hello,


    My own server has similar behavior:

    Code:
    [[email protected] backup]# du -h --max-depth=1
    3.9M    ./.meta
    724M    ./2018-12-05
    477M    ./2018-12-04
    305M    ./2018-12-06
    305M    ./2018-12-08
    304M    ./2018-12-07
    2.1G    .
    It's based on what's changed/being hardlinked to. This might be helpful for you: How do the backups work exactly?


    Thanks!
     
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