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Where The Btrfs Performance Is At Today

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  • #11
    nodatacow and compress are mutually exclusive

    https://btrfs.wiki.kernel.org/index.php/Gotchas:

    mount -o nodatacow also disables compression

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    • #12
      Where The Btrfs Performance Is At Today
      Aaargh! The grammar!

      Like your Mom said:
      Where the performance of BRTFS is today.

      [lets see what mistakes I made in my grammar rant]

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      • #13
        Originally posted by d4ddi0 View Post
        Aaargh! The grammar!

        Like your Mom said:
        Where the performance of BRTFS is today.

        [lets see what mistakes I made in my grammar rant]
        I see a few

        like => as (using like here is colloquial)
        your Mom => your mom (family members are capitalized in different circumstances)
        BRTFS => Btrfs (not grammar, but...)
        lets => let's

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        • #14
          Hi

          It would be nice to compare brtfs performance on battery backed laptop with intel sss against this ext4 mout options:

          noatime,barrier=0,data=writeback,nobh,commit=100,n ouser_xattr

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          • #15
            I would much rather focus on data integrity. Is your data safe with BTRFS? ReiserFS, JFS, XFS, ext3, etc is not.
            http://www.zdnet.com/blog/storage/ho...ta-at-risk/169

            But, researchers shows that ZFS is safe in another research paper.

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            • #16
              voyager_biel Ext4 tuned for performance vs .. how do you tune btrfs... Ah hell who needs it anyway when I have ext4 tuned for performance :P

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              • #17
                Originally posted by alec View Post
                voyager_biel Ext4 tuned for performance vs .. how do you tune btrfs... Ah hell who needs it anyway when I have ext4 tuned for performance :P
                I think brtfs is not yet so common like ext3/4 xfs... got troubles when tried to make /root on brtfs with grub boot manager... should work with grub2 but I haven't try this yet..
                160 MB/s on Intel X-25 SSD with tuned ext4 tested with dd on my laptop is fast enought

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                • #18
                  Originally posted by kebabbert View Post
                  I would much rather focus on data integrity. Is your data safe with BTRFS? ReiserFS, JFS, XFS, ext3, etc is not.
                  http://www.zdnet.com/blog/storage/ho...ta-at-risk/169

                  But, researchers shows that ZFS is safe in another research paper.
                  .. guest you mean data integrity in case of power off. On Laptops in normal case you have battery and you might prefer speed :-).
                  Of course on a server with data integrity is more important.

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                  • #19
                    Originally posted by voyager_biel View Post
                    I think brtfs is not yet so common like ext3/4 xfs... got troubles when tried to make /root on brtfs with grub boot manager... should work with grub2 but I haven't try this yet..
                    160 MB/s on Intel X-25 SSD with tuned ext4 tested with dd on my laptop is fast enought
                    "Not so common" is an understatement for a filesystem which is not available in most of the major linux distribution installers. Especially since the filesystem is still marked expiremental and the most current toolchains is not readily available through the normal channels.

                    Grub1 support is quite unlikely for official development has stopped before btrfs implementation even began and it's practically maintained by everybody and thus nobody. So a different bootmanager is probably called for, yes :-)

                    But performance is probably the last reason for switching to btrfs imho, though that still doesn't mean it may suck. The other features that a filesystem like btrfs or zfs brings make them very interesting for you general allround filesystem needs. And technologies like SSD will probably help ease over some of the perfomance loss that may come with some of their features.
                    But if raw performance matters more than the presence of the features of these next-generation filesytems than than those usecases will possibly will (in the short run at least, possibly for ever) call for another breed of filesystem.

                    So in general the choice will remain "features" vs "performance", but getting those close together will surely help in winning over the masses :-)

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                    • #20
                      Can we please get a filesystem benchmark using a mechanical drive? Everything here is tested using SSDs which is extremely flawed.

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