[Sheepdog] Sheepdog initial performance

[Benjamin Cleyet-Marrel]

Hi,

We are currently in the process of evaluating sheepdog to use as a 
backend storage for our virtual environement.
But right now I am facing really  poor performances on unallocated bloc.
It litterraly takes hours to  convert a 5G file.

So I am mounting the partition with different option without any luck
/dev/sdd1 on /var/lib/sheepdog type ext4 
(rw,noatime,user_xattr,barrier=0,data=writeback,nobh)
Started sheepdog with
sheep -p 7000 -l 0 /var/lib/sheepdog

When I issues
qemu-img convert /images/debian60-64bits.qed -O raw sheepdog:debian60-64bits

It takes hours to finish altought it is just 5G img.
The performance from within the virtual machine is then fine. and close 
to raw performances.

Is there something I am doing wrong ?

Thanks

Cheers





-- 
Benjamin Cleyet-Marrel
Directeur de l'ingénierie
Open Wide Outsourcing
http://outsourcing.openwide.fr