XFS vs ext4

Matt Nelson matt at frozenatom.com
Thu Dec 25 18:50:06 MST 2008


My main reasons for using XFS over ext3 have been, again myth/video related,
when deleting large files.  XFS is much quicker.  Has anyone done much
benchmarking with ext4 yet?  If not I have a spare 250GB drive I might throw
in and test some delete speeds, and other I/O related benchmarking on.

On Thu, Dec 25, 2008 at 2:25 PM, Hans Fugal <hans at fugal.net> wrote:

> Linux 2.6.28 is just out and it includes support for ext4 which is now
> stable. Coincidentally, a new 500G drive is meandering its way to my
> home as we speak. It will be used mostly for MythTV (with 2 HD tuners
> and much transcoding, though I'm not I/O bound on the transcoding). I'm
> an XFS fan, especially for multimedia like MythTV or audio/video
> editing. But, ext4 looks to have many of the advantages of XFS. I
> haven't done a point-by-point comparison since I'm not an expert on
> filesystems, but the major points that they both have are being
> extent-based, delayed allocation, fragmentation resistance and online
> defragmentation, and some others probably.
>
> XFS' big disadvantage from where I sit is that you can't shrink it, only
> grow it. I have wished to shrink an XFS at least once before, so this
> isn't a theoretical problem. Its big advantage is that it's stable and
> proven.
>
> ext4's big disadvantage is its newness. Stable or not it's much newer
> than XFS and a .0 release at the moment. It's advantages include kernel
> developer mindshare, eventualy mainstreamness, and ???. That's where you
> come in. Does ext4 have any significant feature that XFS doesn't, that
> mere mortals running MythTV might notice? Does ext4 support shrinkage?
> Any thoughts?
>
>
> --
> Hans Fugal ; http://hans.fugal.net
>
> There's nothing remarkable about it. All one has to do is hit the
> right keys at the right time and the instrument plays itself.
>    -- Johann Sebastian Bach
>
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