Thanks, I had actually reinstalled and used ext4 (I was already using
LVM) the other day, and my performance has improved tremendously. I
had no idea that btrfs was that slow. Thanks for the other tips
On Sun, May 30, 2010 at 7:19 AM, Avi Kivity <avi(a)redhat.com> wrote:
On 05/27/2010 08:29 PM, Kenneth Armstrong wrote:
> Something that occured to me is that I am using BTRFS with Fedora 13
> instead of EXT4, which is what I was using under F11. I was under the
> impression that BTRFS was actually a bit quicker than EXT4 though.
btrfs is slower than ext4, especially with cache=writethrough. Try
cache=writeback to recover some of the performance loss.
ext4 is slower as well due to defaulting to barrier=1. barrier=0 will be
faster at the cost of data integrity.
For best performance, use LVM and cache=off.
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