HOST DEVICE WITH MULTI-PATH LAYER CONFIGURED FOR DETECTION AND RESOLUTION OF OVERSUBSCRIPTION CONDITIONS

摘要

An apparatus comprises a host device configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device comprises a set of input- output queues and a multi-path input-output driver configured to select input-output operations from the set of input-output queues for delivery to the storage system over the network. The multi- path input-output driver is further configured to maintain payload size counters to track outstanding command payload for respective ones of a plurality of paths from the host device to the storage system, to detect an oversubscription condition relating to at least one of the paths based at least in part on values of one or more of the payload size counters, and to initiate one or more automated actions responsive to the detected oversubscription condition. For example, automated deployment of one or more additional paths associated with respective spare communication links between the host device and the storage system may be initiated.