[Btrfs-users] btrfs 0.13 and XFS comparison

[Chris Mason]

On Sunday 23 March 2008, Chris Samuel wrote:
> Hi there,
>
> Just gave 0.13 a spin against XFS (both with default mkfs options) on
> my SATA tower and was impressed by how much performance has improved
> since last time I played with it (v0.5)!

Great to hear, thanks for doing this.

>
> It pretty much matched XFS for I/O performance and had much better
> file creation/deletion performance.
>
> http://www.csamuel.org/2008/03/23/btrfs-013-and-xfs-benchmarks

You can mount btrfs with -o nodatasum to see the performance impact of the 
checksumming code.  It is higher than it should be right now, both reading 
and writing because I'm not interacting as well with the asyncrhonous 
writeback and readahead code in the kernel as well as I should be.

On my 4 drive system here, when I stripe across all 4 drives, I can write at 
180MB/s and read at 200MB/s for the raw device.  Btrfs only does 132MB/s 
writes and 100MB/s reads, but can go at disk speed if I turn off 
checksumming.

(I didn't test XFS, but I fully expect it to go at drive speed).

-chris