On Thu, Jul 04, 2013 at 06:26:32PM +0100, Graham Anderson wrote:
On Thursday 04 Jul 2013 11:54:05 Jeff Mahoney wrote:
So, I'd like to hear your stories. What's worked for you? What hasn't worked? What would you consider the pain points with using btrfs?
When I tested a variety of KVM image formats and settings to see what worked well with regards to disk read/write speed; I found that any disk image stored on a btrfs volume made writing to the the VM filesystem (ext4) too slow to be usable for any kind of real work load.
VM and database loads do not play well with the COW mechanism. The NOCOW file attribute (chattr +C) fixed the performance problems with VM images for me and reportedly for others. This comes at a price, the checksums are turned off for the file. -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org