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    SubjectRe: filesystem benchmarking fun

    On May 16 2007 10:42, Chris Mason wrote:
    >
    >For example, I'll pick on xfs for a minute. compilebench shows the
    >default FS you get from mkfs.xfs is pretty slow for untarring a bunch of
    >kernel trees.

    I suppose you used 'nobarrier'? [ http://lkml.org/lkml/2006/5/19/33 ]

    >Dave Chinner gave me some mount options that make it
    >dramatically better,

    and `mkfs.xfs -l version=2` is also said to make it better

    >but it still writes at 10MB/s on a sata drive that
    >can do 80MB/s. Ext3 is better, but still only 20MB/s.
    >
    >Both are presumably picking a reasonable file and directory layout.
    >Still, our writeback algorithms are clearly not optimized for this kind
    >of workload. Should we fix it?

    Also try with tmpfs.



    Jan
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