[sheepdog-users] Is qemu faster than sbd?

[zhanghongzhou]

Thanks.
Performance gets better with '-n' and lowering log level.
One more question, can we expose sbd to clients? How could client access/read/write to sbd disks in cluster?
> Date: Fri, 21 Aug 2015 13:58:19 +0800
> From: namei.unix at gmail.com
> To: zhang.hongzhou at hotmail.com
> CC: sheepdog-users at lists.wpkg.org
> Subject: Re: [sheepdog-users] Is qemu faster than sbd?
> 
> On Thu, Aug 20, 2015 at 04:47:22PM +0000, zhanghongzhou wrote:
> > Hi experts,
> > I mounted sbd as ext4 and tested IOPS for 4k rand/seq rw
> > 32 sheep, 3-replica. Backend is ssd.
> > The result is much slower than testing on bear ssd.randread IOPS: 16732randwrite IOPS: 1436sequential read throughput: 64MB/ssequential write throughput: 6MB/s
> > I saw some qemu fio test results from COJ2015 presentation, which is much better.
> > Is my sbd performance result solid? Or maybe it's configuration difference?
> > B.R.Hongzhou 		 	   		  
> 
> Please add '-n' to sheep startup option for best performance.
> 
> Thanks,
> Yuan
 		 	   		  
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