Methods, systems, and computer program products for managing quality of service for shared storage accessed by a plurality of nodes are disclosed. According to one method, at a node of a plurality of nodes sharing access to a first disk array, quality-of-service (QoS) metadata associated with a portion of the disk array are requested from a server, wherein the QoS metadata includes at least one performance criterion for the portion of the disk array. I/O performance is monitored for the portion of the disk array in response to receiving the QoS metadata. The monitored I/O performance is compared with the QoS metadata. Based upon the comparison of the monitored I/O performance with the QoS metadata, it is determined whether a QoS violation has occurred. In response to determining that a QoS violation has occurred, the server is requested to migrate data associated with the portion of the disk array.