Curious observation on backup speed

verdon

• August 30, 2016 07:12

Hi, I just recently switched from 'Legacy Backup' to the new 'Backup'. As far as I can tell, I have configured the new backup for the same behaviour as the legacy system was. I have a new server with an SSD drive, which is pretty quick. The legacy backups were taking 29 minutes to run and were running about 12:30 am. The new backup takes 47 minutes to run and starts at about 2:00 am. Is this difference in speed of completion to be expected? At about 150%, it's actually a fairly significant difference.

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  cPanelMichael

  • August 30, 2016 18:13

  Hello, You should first review the backup log in /usr/local/cpanel/logs/cpbackup/ to verify if the backup process was paused at any point in time due to the > Tweak Settings" if you want to adjust some of the compression options to increase performance (Ensure you have sufficient resources to do so). The available options are documented at: Tweak Settings - Documentation - cPanel Documentation In addition, under the "System" tab, you may find the following option helpful: "I/O priority level at which nightly backups are run (Maximum: 7)" You must compile ionice with your kernel to use this option. ionice manages I/O scheduling for processes on your system. Specifying a lower value for this option gives the process a higher priority. This option can accept integer values between 0 and 7. Thank you.

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  brt

  • October 02, 2016 19:29

  I have a powerful server, but I still have max compression and limit it to one zip thread to keep any performance impact to a minimum. I don't mind if backups run for 8 hours, as long as they don't impact anything. I would guess it's one of the settings cPanelMichael mentioned though.

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