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Hash: SHA256

Hi,

I see vastly differing backup speeds on a single machine, single partition - - the jobs only differ regarding FileSets (and name/description, of course):

FileSet {
  Name = "Set1"
  Description = "Backup Set1"
  Include {
    Options {
      Signature = MD5 # calculate md5 checksum per file
      One FS = yes    # change into other filessytems
      No Atime = yes
      Sparse = yes
    }
    File = /home/user
  }
  Exclude {
    File = /home/user/sub/directory
  }
}
FileSet {
  Name = "Set2"
  Description = "Backup Set2"
  Include {
    Options {
      Signature = MD5 # calculate md5 checksum per file
      One FS = yes    # change into other filessytems
      No Atime = yes
      Sparse = yes
    }
    File = /home/user/sub/directory
  }
}

Set1 took ~2.5 days for ~6 GB and Set2 has already backed up 60 GB within the first few hours. Neither cpu nor io was saturated during the backup of Set1.

I suspect Set1 to have smaller, slightly compressable files and Set2 to have larger, uncompressable files - does this rectify this huge difference in speed or should I look for something else?

In case it matters: This is ext4 on luks. The machine encrypts the backups (but again: identical for both). The os is archlinux32.

regards,
Erich

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