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Thread: XFS Developer Takes Shots At Btrfs, EXT4

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  1. #1
    Join Date
    Jan 2007
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    Default XFS Developer Takes Shots At Btrfs, EXT4

    Phoronix: XFS Developer Takes Shots At Btrfs, EXT4

    Chris Mason of Btrfs fame wasn't the only Linux file-system developer talking to the public last week. While the Btrfs talk was going on in Los Angeles at SCALE 10x, Dave Chinner was down under in Australia at LCA2012 talking about XFS. His talk included some controversial shots at EXT4 and Btrfs...

    http://www.phoronix.com/vr.php?view=MTA0NzM

  2. #2
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    "EXT4 is not as stable or as well tested as most people think ... EXT4 has become an aggregation of semi-finished projects that don't play well with each other."

    FUD, plain and simple. Currently Ext4 is the fastest and most reliable journaled linux fs. The truth is, XFS sucks

  3. #3
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    Default Huh?

    Quote Originally Posted by halo9en View Post
    The truth is, XFS sucks
    Got any facts to go with your FUD?

    Local experience says that XFS is the best filesystem for big files like mythtv recordings and virtual image files.

    Esp. since 2.6.39, XFS is sturdy and fast. I have RAID 0 with battery backup and write caching enabled, yes I am playing with fire but I have good backups. I get 575 MBytes/sec write and 375 Mbytes/sec read performance, which is pretty much hardware limited. I have had numerous system crashes without any data corruption. I can run 8 fully-loaded virtual machines from images on the same XFS filesystem, and they all get good disk io performance. I have tried ext3 and ext4 in this application and the performance is just miserable.

  4. #4
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    Why do I always get the feeling the articles here have become almost all sensationalist or displaying negative vibes. Is it really necessary to present things in a negative way to get a lot of publicity?

    You could formulate it in a much more distant and professional way. "XFS Developer Comments On Other Filesystems", while writing something like "amongst the perceived deficiencies mentioned were ..."

    I bet this would make people here react in a much less aggressive way, too. But I guess it's become all about money.

  5. #5
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    Honestly, I fully agree about btrfs.
    Every time I try btrfs (last try with 3.0 on ubuntu 11.10), I end up with backtraces on my dmesg and strange problems, especially when the filesystem is starting to run low on disk space.

    Of course I can try to bug report, and test, and etc, but honestly with so many filesystems available, I just ignore btrfs.

  6. #6
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    Oct 2010
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    XFS may be well suited for use cases where files are never/rarely overwritten like a media archive, but keep it off any essential partition like boot/root. Restoring from backups is not that fun when your computer no longer boots. http://ubuntuforums.org/showthread.php?t=1025412

  7. #7
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    Dec 2008
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    My mind boggles that ext4 filesystems STILL are not supported with ext-tools for filesystems larger than 16TB.

    XFS is the only filesystem I trust to use for >16TB. Other possibilities are JFS, ZFS, and btrfs, but none of those are mature, stable, and actively developed on linux.

    Maybe one day btrfs will be stable and not have any flaws (very slow performance in certain situations). But that day is far from today.

  8. #8

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    Quote Originally Posted by jwilliams View Post
    My mind boggles that ext4 filesystems STILL are not supported with ext-tools for filesystems larger than 16TB..
    This is not true anymore.

    https://fedoraproject.org/wiki/Features/F17Ext4Above16T

  9. #9
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    Dec 2008
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    Quote Originally Posted by RahulSundaram View Post
    Good to know. Unfortunately, from your link:

    "e2fsprogs-1.42 has already been released with initial support greater than 16T, and kernel code already has support as well. There are rough edges to work out, and there is testing to be done."

    So, I would not trust it for at least 6 months, if not a year, until they have worked out the "rough edges" and tested it thoroughly.

  10. #10

    Default

    Quote Originally Posted by jwilliams View Post
    Good to know. Unfortunately, from your link:

    "e2fsprogs-1.42 has already been released with initial support greater than 16T, and kernel code already has support as well. There are rough edges to work out, and there is testing to be done."

    So, I would not trust it for at least 6 months, if not a year, until they have worked out the "rough edges" and tested it thoroughly.
    If you have over 16 TB drives that you handle regularly, then you are a good candidate to participate in testing and report any issues. It won't happen automatically.

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