Host device with active-active storage aware path selection

A method comprising:

• controlling delivery of input-output operations from a host device to at least first and second storage systems over selected ones of a plurality of paths through a network, the first and second storage systems being arranged in an active-active configuration relative to one another;
• identifying one or more logical storage devices that are each accessible via at least first and second different ones of the paths to respective ones of the first and second storage systems;
• and
• modifying path selection for input-output operations directed to the one or more identified logical storage devices relative to path selection for input-output operations directed to one or more other logical storage devices;
• wherein a given one of the identified logical storage devices is stored in the first storage system as a first instance of the given identified logical storage device and is also stored in the second storage system as a second instance of the given identified logical storage device, so as to be fully accessible in each of the first and second storage systems;
• wherein input-output operations targeting logical addresses in a first range of logical addresses of the given identified logical storage device are directed to the first instance of the given logical storage device in the first storage system, and input-output operations targeting logical addresses in a second range of logical addresses of the given identified logical storage device, different than the first range of logical addresses of the given identified logical storage device, are directed to the second instance of the given logical storage device in the second storage system, in accordance with the modified path selection for the input-output operations directed to the given identified logical storage device;
• and
• wherein the method is performed by at least one processing device comprising a processor coupled to a memory.

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code, when executed by at least one processing device comprising a processor coupled to a memory, causes said at least one processing device:

• to control delivery of input-output operations from a host device to at least first and second storage systems over selected ones of a plurality of paths through a network, the first and second storage systems being arranged in an active-active configuration relative to one another;
• to identify one or more logical storage devices that are each accessible via at least first and second different ones of the paths to respective ones of the first and second storage systems;
• and
• to modify path selection for input-output operations directed to the one or more identified logical storage devices relative to path selection for input-output operations directed to one or more other logical storage devices;
• wherein a given one of the identified logical storage devices is stored in the first storage system as a first instance of the given identified logical storage device and is also stored in the second storage system as a second instance of the given identified logical storage device, so as to be fully accessible in each of the first and second storage systems;
• and
• wherein input-output operations targeting logical addresses in a first range of logical addresses of the given identified logical storage device are directed to the first instance of the given logical storage device in the first storage system, and input-output operations targeting logical addresses in a second range of logical addresses of the given identified logical storage device, different than the first range of logical addresses of the given identified logical storage device, are directed to the second instance of the given logical storage device in the second storage system, in accordance with the modified path selection for the input-output operations directed to the given identified logical storage device.