On 05/23/2012 12:01 AM, Stefan Priebe - Profihost AG wrote:
Am 23.05.2012 08:30, schrieb Josh Durgin:
On 05/22/2012 11:18 PM, Stefan Priebe - Profihost AG wrote:
Hi,
So try enabling RBD writeback caching — see http://marc.info
/?l=ceph-devel&m=133758599712768&w=2
will test tomorrow. Thanks.
Can we path this to the qemu-drive option?
Yup, see http://article.gmane.org/gmane.comp.file-systems.ceph.devel/6400
I'm sorry, i still don't get it where to pass rbd_cache_max_dirty, ...
can i add it just to the ceph.conf? Even with qemu 1.0?
You can use any of the rbd-specific options (like rbd_cache_max_dirty)
with qemu >= 0.15.
You can set them in a global ceph.conf file, or specify them on the qemu
command line like:
qemu -m 512 -drive
file=rbd:pool/image:rbd_cache_max_dirty=0:rbd_cache=true,format=raw,if=virtio
Josh
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