Re: [zfs-discuss] ZFS, XFS, and EXT4 compared

["Cyril Plisko" <cyril.plisko@xxxxxxxxxxxx>]

Jeffrey,

it would be interesting to see your zpool layout info as well.
It can significantly influence the results obtained in the benchmarks.



On 8/30/07, Jeffrey W. Baker <jwbaker@xxxxxxx> wrote:
> I have a lot of people whispering "zfs" in my virtual ear these days,
> and at the same time I have an irrational attachment to xfs based
> entirely on its lack of the 32000 subdirectory limit.  I'm not afraid of
> ext4's newness, since really a lot of that stuff has been in Lustre for
> years.  So a-benchmarking I went.  Results at the bottom:
>
> http://tastic.brillig.org/~jwb/zfs-xfs-ext4.html
>
> Short version: ext4 is awesome.  zfs has absurdly fast metadata
> operations but falls apart on sequential transfer.  xfs has great
> sequential transfer but really bad metadata ops, like 3 minutes to tar
> up the kernel.
>
> It would be nice if mke2fs would copy xfs's code for optimal layout on a
> software raid.  The mkfs defaults and the mdadm defaults interact badly.
>
> Postmark is somewhat bogus benchmark with some obvious quantization
> problems.
>
> Regards,
> jwb
>
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-- 
Regards,
        Cyril