Asymmetric Logical Unit Access path distribution system

1. An Asymmetric Logical Unit Access (ALUA) path distribution system, comprising:

a plurality of host devices;

a plurality of storage subsystems;

a management server device;

a second aggregated networking device that is coupled to the management server device and that couples the plurality of host devices to the plurality of storage subsystems; and

a first aggregated networking device that is coupled to the management server device and that couples the plurality of host devices to the plurality of storage subsystems, wherein the first aggregated networking device includes a processor that is configured to:

snoop communications between the plurality of host devices and the plurality of storage subsystems to identify first snooped information;

receive, from the management server device, second snooped information identified by the second aggregated networking device;

build, using the first snooped information and the second snooped information, a path distribution table that identifies:

each active-optimized path provided by the first aggregated networking device and the second aggregated networking device between the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems; and

determine, using the path distribution table, that a first active-optimized path should be redistributed from being provided by the first aggregated networking device to being provided by the second aggregated networking device and, in response, cause 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.

2. The system of claim 1 , wherein snooped communications between the plurality of host devices and the plurality of storage subsystems include LUN-specific inquiry communications and Report Target Port Group (RTPG) communications.

3. The system of claim 1 , wherein the causing the first host device that utilizes the first active-optimized path to communicate with the first storage subsystem to remap the first LUN accessed via the first active-optimized path such that that first active optimized path is provided by the second aggregated networking device includes:

transmitting, to the host device, a LUN identifier for the first LUN along with an instruction to cause storage controller ownership of the first LUN to be changed.

4. The system of claim 1 , wherein the first aggregated networking device is configured to:

identify that a second active-optimized path is the only path available between a second host device and a second LUN and, in response, determine that the second active-optimized path should not be redistributed from being provided by the first aggregated networking device to being provided by the second aggregated networking device.

5. The system of claim 1 , wherein the determining that the first active-optimized path should be redistributed from being provided by the first aggregated networking device to being provided by the second aggregated networking device includes:

determining, using the path distribution table, that the first aggregated networking device provides at least two more active-optimized paths than the second aggregated networking device.

6. The system of claim 1 , wherein the first aggregated networking device is configured to:

build, using the first snooped information and the second snooped information, the path distribution table that identifies:

each active-non-optimized path provided by the first aggregated networking device and the second aggregated networking device between one of the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems.

7. An Information Handling System (IHS), comprising:

a processing system; and

a memory system that is coupled to the processing system and that includes instructions that, when executed by the processing system, cause the processing system to provide a path distribution engine that is configured to:

snoop communications between a plurality of host devices and a plurality of storage subsystems to identify first snooped information;

receive, from a management server device that is coupled to the processing system, second snooped information identified by an aggregated networking device that is coupled to the management server device;

build, using the first snooped information and the second snooped information, a path distribution table that identifies:

each active-optimized path provided by the processing system and a second aggregated networking device between the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems; and

determine, using the path distribution table, that a first active-optimized path should be redistributed from being provided by the processing system to the being provided by aggregated networking device and, in response, cause 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 aggregated networking device.

8. The IHS of claim 7 , wherein snooped communications between the plurality of host devices and the plurality of storage subsystems include LUN-specific inquiry communications and Report Target Port Group (RTPG) communications.

9. The IHS of claim 7 , wherein the causing the first host device that utilizes the first active-optimized path to communicate with the first storage subsystem to remap the first LUN accessed via the first active-optimized path such that that first active optimized path is provided by the aggregated networking device includes:

transmitting, to the host device, a LUN identifier for the first LUN along with an instruction to cause storage controller ownership of the first LUN to be changed.

10. The IHS of claim 7 , wherein the path distribution engine is configured to:

identify that a second active-optimized path is the only path available between a second host device and a second LUN and, in response, determine that the second active-optimized path should not be redistributed from being provided by the processing system to being provided by the aggregated networking device.

11. The IHS of claim 7 , wherein the determining that the first active-optimized path should be redistributed from being provided by the processing system to being provided by the aggregated networking device includes:

determining, using the path distribution table, that the processing system provides at least two more active-optimized paths than the aggregated networking device.

12. The IHS of claim 7 , wherein the path distribution engine is configured to:

build, using the first snooped information and the second snooped information, the path distribution table that identifies:

each active-non-optimized path provided by the processing system and the aggregated networking device between one of the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems.

13. The IHS of claim 7 , wherein the determining that the first active-optimized path should be redistributed from being provided by the processing system to the being provided by aggregated networking device includes:

displaying information associated with each active-optimized path provided by the processing system and the aggregated networking device between one of the plurality of host devices and respective LUNs included on the plurality of storage subsystems; and

receiving, subsequent to the displaying, a command to redistribute the first active-optimized path from being provided by the processing system to the being provided by the aggregated networking device.

14. A method for distributing paths, comprising:

snooping, by a first aggregated networking device, communications between a plurality of host devices and a plurality of storage subsystems to identify first snooped information;

receiving, by the first aggregated networking device from a management server device, second snooped information identified by a second aggregated networking device that is coupled to the management server device;

building, by the first aggregated networking device using the first snooped information and the second snooped information, a path distribution table that identifies:

each active-optimized path provided by the first aggregated networking device and the second aggregated networking device between the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems; and

determining, by the first aggregated networking device using the path distribution table, that a first active-optimized path should be redistributed from being provided by the first aggregated networking device to the being provided by second aggregated networking device and, in response, causing 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.

15. The method of claim 14 , wherein snooped communications between the plurality of host devices and the plurality of storage subsystems include LUN-specific inquiry communications and Report Target Port Group (RTPG) communications.

16. The method of claim 14 , wherein the causing the first host device that utilizes the first active-optimized path to communicate with the first storage subsystem to remap the first LUN accessed via the first active-optimized path such that that first active optimized path is provided by the second aggregated networking device includes:

transmitting, by the first aggregated networking device to the host device, a LUN identifier for the first LUN along with an instruction to cause storage controller ownership of the first LUN to be changed.

17. The method of claim 14 , further comprising:

identifying, by the first aggregated networking device, that a second active-optimized path is the only path available between a second host device and a second LUN and, in response, determine that the second active-optimized path should not be redistributed from being provided by the first aggregated networking device to being provided by the second aggregated networking device.

18. The method of claim 14 , wherein the determining that the first active-optimized path should be redistributed from being provided by the first aggregated networking device to being provided by the second aggregated networking device includes:

determining, using the path distribution table, that the first aggregated networking device provides at least two more active-optimized paths than the second aggregated networking device.

19. The method of claim 14 , further comprising:

building, by the first aggregated networking device using the first snooped information and the second snooped information, the path distribution table that identifies:

each active-non-optimized path provided by the first aggregated networking device and the second aggregated networking device between one of the plurality of host devices and respective Logical Unit Numbers (LUNs) included on the plurality of storage subsystems.

20. The method of claim 14 , wherein the determining that the first active-optimized path should be redistributed from being provided by the first aggregated networking device to the being provided by second aggregated networking device includes:

displaying, by first aggregated networking device, information associated with each active-optimized path provided by the first aggregated networking device and the second aggregated networking device between one of the plurality of host devices and respective LUNs included on the plurality of storage subsystems; and

receiving, first aggregated networking device subsequent to the displaying, a command to redistribute the first active-optimized path from being provided by the first aggregated networking device to the being provided by the second aggregated networking device.