On Thu, Aug 08, 2013 at 09:13:04AM -0700, John Williams wrote: > Phoronix periodically runs benchmarks on filesystems, and one thing I > have noticed is that btrfs always does terribly on their fio "Intel > IOMeter fileserver access pattern" benchmark: > > http://www.phoronix.com/scan.php?page=article&item=linux_310_10fs&num=2 > > Here, btrfs is more than 6 times slower than ext4, and about 3 times > slower than XFS. > > Lest we attribute it to an unavoidable downside of COW filesystems and > move on...no, we cannot do that, because ZFS does well here -- btrfs > is about 6 times slower than ZFS! > > Note that btrfs does quite well in the other Phoronix benchmarks. It > is just the fio fileserver benchmark that btrfs has problems with. > > What is going on here? Why is btrfs doing so poorly? Excellent question, I'll get back to you on that. Thanks, Josef -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
