Btrfs Extent Tree v2 Work Progressing For Improving The File-System's On-Disk Format

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  • phoronix
    Administrator
    • Jan 2007
    • 67360

    Btrfs Extent Tree v2 Work Progressing For Improving The File-System's On-Disk Format

    Phoronix: Btrfs Extent Tree v2 Work Progressing For Improving The File-System's On-Disk Format

    You may recall the news from a few months ago about the work to improve Btrfs' on-disk format in addressing "painful parts" of its design. That "extrent-tree-v2" work has been progressing and recently was queued up into the Btrfs for-next code albeit hidden behind a debug flag...

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  • cynic
    Senior Member
    • Oct 2011
    • 1091

    #2
    There are some interesting blog posts about the features of extent tree v2 here:

    Musings about current development work.

    Comment

    • alvinde
      Junior Member
      • Sep 2019
      • 19

      #3
      I dont know enough about the situation technically, but as a long time btrfs user I have to ask. Will this new on-disk format allow RAID5/6 to eventually work correctly? Or are the fundamental RAID5/6 issues originating somewhere else?

      Comment

      • cynic
        Senior Member
        • Oct 2011
        • 1091

        #4
        Originally posted by alvinde View Post
        I dont know enough about the situation technically, but as a long time btrfs user I have to ask. Will this new on-disk format allow RAID5/6 to eventually work correctly? Or are the fundamental RAID5/6 issues originating somewhere else?
        I don't think this particular patchset has anything to do with that issue, but I might be wrong.

        Comment

        • mether
          Fedora Contributor
          • Oct 2009
          • 2517

          #5
          Originally posted by alvinde View Post
          I dont know enough about the situation technically, but as a long time btrfs user I have to ask. Will this new on-disk format allow RAID5/6 to eventually work correctly? Or are the fundamental RAID5/6 issues originating somewhere else?
          This work appears to be largely performance improvements, around snapshots and such. There has been no recent changes to the RAID5/6 status afaik.

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          • darkbasic
            Senior Member
            • Nov 2009
            • 3085

            #6
            Originally posted by RahulSundaram View Post

            This work appears to be largely performance improvements, around snapshots and such.
            Would extent tree v2 allow me to use quota along with snapshots without stalling my system for minutes every time?
            ## VGA ##
            AMD: X1950XTX, HD3870, HD5870
            Intel: GMA45, HD3000 (Core i5 2500K)

            Comment

            • mether
              Fedora Contributor
              • Oct 2009
              • 2517

              #7
              Originally posted by darkbasic View Post

              Would extent tree v2 allow me to use quota along with snapshots without stalling my system for minutes every time?
              I don't use quotas so I wouldn't know but it would be a good time for you to try the tree with the changes and give them the feedback if it hasn't improved

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              • cynic
                Senior Member
                • Oct 2011
                • 1091

                #8
                Originally posted by darkbasic View Post

                Would extent tree v2 allow me to use quota along with snapshots without stalling my system for minutes every time?
                probably yes!

                Comment

                • ResponseWriter
                  Senior Member
                  • Apr 2016
                  • 367

                  #9
                  The one thing I notice as unbearably slow is deleting a folder of multiple GB. Is this likely to be improved?

                  Comment

                  • krzyzowiec
                    Senior Member
                    • Jun 2021
                    • 245

                    #10
                    Originally posted by ResponseWriter View Post
                    The one thing I notice as unbearably slow is deleting a folder of multiple GB. Is this likely to be improved?
                    I've not noticed any slowness. How many GB are you talking about? On an SSD or HDD?

                    Comment

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