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A Patch-Set Making Btrfs ~20% Faster

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  • A Patch-Set Making Btrfs ~20% Faster

    Phoronix: A Patch-Set Making Btrfs ~20% Faster

    A revised patch-set was published a few days ago that can make meta-data operations for the Btrfs file-system approximately 20% faster...

    http://www.phoronix.com/vr.php?view=MTE5NTU

  • #2
    ZFSOnLinux already caches metadata information like this. I am surprised that btrfs did not.

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    • #3
      Originally posted by ryao View Post
      ZFSOnLinux already caches metadata information like this. I am surprised that btrfs did not.
      What do you mean? As far as I can see from the article it is caching file locations, not metadata. This will be a pretty small improvement when dealing with few files, but adds up over many files.

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      • #4
        just trying it out on my portage-partition

        and it seems to slow down initial performance a bit (tried out a emerge --metadata && eix-update right after mounting the partition - it took pretty long to actually start displaying percentage)

        will see how it goes over time and whether this is only for the first time ...

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        • #5
          I've patched latest kernel git code, and the result is a kernel oops and non-bootable system.
          btrfs-zero-log utility helps with fs recovery

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          • #6
            Originally posted by TheBlackCat View Post
            What do you mean? As far as I can see from the article it is caching file locations, not metadata. This will be a pretty small improvement when dealing with few files, but adds up over many files.
            That information is metadata by definition.

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            • #7
              No btrfsck? No, thank you.

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              • #8
                Originally posted by Alejandro Nova View Post
                No btrfsck? No, thank you.
                Btrfs has had an fsck utility for a long, long time now.
                It also has online scrubbing, eliminating the need for fsck in most cases. From personal experience, it works amazingly well.


                Any performance improvements are always welcome. It's an awesome file system already, but there is no denying that it is quite a bit slower than ext4 in some areas.

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