Asymmetric logical unit access path distribution system

Abstract

An ALUA path distribution system includes host devices coupled to storage subsystems by aggregated networking devices. A first aggregated networking device snoops communications between the host devices and the storage subsystems to identify first snooped information, receives second snooped information identified by a second aggregated networking device, and uses the snooped information to build a path distribution table identifying each active-optimized path provided by the aggregated networking devices between the host devices and respective LUNs on the storage subsystems. The first aggregated networking device then determines that a first active-optimized path that it provides should be redistributed to the second aggregated networking device and, in response, causes a first host device that utilizes the first active-optimized path to communicate with a first storage subsystem to remap a first LUN accessed via the first active-optimized path such that that first active-optimized path is provided by the second aggregated networking device.