hi,all Here is a problem confused me a lot. Some OSD's workload will be very high when the client read a file continuously. So i think the cluster must have a strategy to balance workload there are two classes "MovingAverager and IATAverager ",but i can not figure out what the class IATAverager mean here? and futhermore, can we bring tiered storage theory in ceph? thanks! -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html