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? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
