[sheepdog-users] Concern about sheepdog performance

[Liu Yuan]

On 12/20/2012 08:05 PM, Valerio Pachera wrote:
> sheep -j dir=/mnt/sdb1/sdj size=512 /mnt/sheepdog/
> kvm -drive file=sheepdog:test,cache=none -cdrom
> /root/vm/iso/systemrescuecd-x86-3.1.1.iso -boot order=d -k it -vnc :1
> -m 512 -daemonize
>   9,8M/s
>   9.8M/s (writing twice the file)
>   11.8M/s (writing twice, without oflag=direct)

Could you use 'kvm -drive file=sheepdog:test,cache=none,if=virtio' to
get a fair comparison? seems that we don't get a boot as I expected.
This means 'dd' will never issue as many sync requests as I thought.
Anyway, the fix I mentioned will boost the sync write without object cache.

Thanks,
Yuan