On Wed, Sep 13, 2006 at 12:17:55PM -0700, Dan Williams wrote: ... > >Out of curiosity; how does accelerated compare to non-accelerated? > > One quick example: > 4-disk SATA array rebuild on iop321 without acceleration - 'top' > reports md0_resync and md0_raid5 dueling for the CPU each at ~50% > utilization. > > With acceleration - 'top' reports md0_resync cpu utilization at ~90% > with the rest split between md0_raid5 and md0_raid5_ops. > > The sync speed reported by /proc/mdstat is ~40% higher in the accelerated > case. Ok, nice :) > > That being said, array resync is a special case, so your mileage may > vary with other applications. Every-day usage I/O performance data would be nice indeed :) > I will put together some data from bonnie++, iozone, maybe contest, > and post it on SourceForge. Great! -- / jakob - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
