Jens Axboe wrote: > On Wed, Jun 11 2008, Alan D. Brunelle wrote: >> Dmitri Monakhov wrote: >> >> Could it be that in the first case you will have merges, thus creating >> fewer/larger I/O requests? Running iostat -x during the two runs, and >> watching the output is a good first place to start. > > I think it's mostly down to whether a specific drive is good at doing > 124kb writes + 4k seek (and repeat) compared to regular streaming > writes. The tested disk was SATA with write back caching, there should > be no real command overhead gain in those size ranges. > Probably true, I'd think the iostat -x data would be very helpful though. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
