gluster's cpuload is too high on specific birck daemon

[andrew.kong at sk.com (공용준(yongjoon kong)/Cloud Computing 기술담당/SKCC)]

Hello, 

I'm gluster with distributed-replicated mode(4 brick server)

And 10client server mount gluster volume brick1 server. ( mount -t glustefs brick1:/volume /mnt)

And there's very strange thing. 

The brick1's cpu load is too high. From 'top' command, it's over 400%
But other brick's load is too low. 

Is there any reason for this? Or Is there anyway tracking down this issue?

Thanks.