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    SubjectRe: Desktop Filesystem Benchmarks in 2.6.3
    XFS is the best filesystem.

    David Weinehall wrote:

    >On Tue, Mar 02, 2004 at 03:33:13PM -0700, Dax Kelson wrote:
    >>On Tue, 2004-03-02 at 09:34, Peter Nelson wrote:
    >>>Hans Reiser wrote:
    >>>I'm confused as to why performing a benchmark out of cache as opposed to
    >>>on disk would hurt performance?
    >>My understanding (which could be completely wrong) is that reieserfs v3
    >>and v4 are algorithmically more complex than ext2 or ext3. Reiserfs
    >>spends more CPU time to make the eventual ondisk operations more
    >>When operating purely or mostly out of ram, the higher CPU utilization
    >>of reiserfs hurts performance compared to ext2 and ext3.
    >>When your system I/O utilization exceeds cache size and your disks
    >>starting getting busy, the CPU time previously invested by reiserfs pays
    >>big dividends and provides large performance gains versus more
    >>simplistic filesystems.
    >>In other words, the CPU penalty paid by reiserfs v3/v4 is more than made
    >>up for by the resultant more efficient disk operations. Reiserfs trades
    >>CPU for disk performance.
    >>In a nutshell, if you have more memory than you know what do to with,
    >>stick with ext3. If you spend all your time waiting for disk operations
    >>to complete, go with reiserfs.
    >Or rather, if you have more memory than you know what to do with, use
    >ext3. If you have more CPU power than you know what to do with, use
    >On slower machines, I generally prefer a little slower I/O rather than
    >having the entire system sluggish because of higher CPU-usage.
    >Regards: David Weinehall

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