scheldued snapshots and manual snapshots

  • hi

    is this safe to have sheldued snapshots enabled (7 automatic dialy snaps) and some old manual snaps? how does xcp-ng manages the old snap?

    if the manual snap would be like three months old could it be dangerous? inconsistency problems and so on?


  • XCP-ng Team

    Scheduled snaps won't have any interference with manuals snapshots (XO is using a specific tracking for automated snapshots).

  • OK.

    If I want to delete all snapshots, in which direction should I start deleting snaps? from oldest to newest? or from newest to oldest?

  • XCP-ng Team

    Just delete them all, no order is needed.

  • Keep in mind that too much active snapshots may degrade your disk performance enormous, as for every transation every snapshot has to be considered for changes.
    (At least it was like that, a while a go with XenServer, Oliver may correct me on that - also ZFS should bring a big boost for snapshots)

  • XCP-ng Team

    You'll end up with a chain, yes (so every read will need to make "hops" on each member of the chain).

    Longer the chain, slower the operation. But it shouldn't be too catastrophic either (for a heavily IOPS loaded VM, you'll notice the difference, but not in other less IOPS hungry scenarios)

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