LUN division method and device

1. A Logical Unit Number (LUN) division method, comprising:

checking and adjusting a connection manner and number of Serial Attached Small Computer System Interface (SCSI) (SAS) connections of storage enclosures and a controller, so as to make a maximum output bandwidth of each storage enclosure consistent;

querying controller port identifiers and storage enclosure identifiers;

creating a Mdisk array, and adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk;

logically dividing a storage space in the Mdisk array to create a volume, and dividing the volume into LUNs, wherein Mdisks that form the LUNs are made to come from different storage enclosures and different controller ports; and

mapping the LUNs to a host.

2. The method according to claim 1 , wherein the querying controller port identifiers and storage enclosure identifiers comprises:

querying the controller port identifier controller_id based on a system command lscontroller, and querying the storage enclosure identifier enclosure_id based on a system command lsenclosure.

3. The method according to claim 1 , further comprising: after the Mdisk array is created, adding the Mdisk array to a storage pool, and specifying a level of a Redundant Array of Independent Disks (RAID) in the Mdisk array based on a system command.

4. The method according to claim 1 , wherein the adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk comprises:

modifying an attribute of the Mdisk based on a system command charray to add the corresponding controller port identifier and the corresponding storage enclosure identifier to the Mdisk.

5. The method according to claim 1 , wherein the making Mdisks that form the LUNs come from different storage enclosures and different controller ports comprises:

making the storage enclosure identifier in an attribute of the Mdisk not repeated and the controller port identifier in the attribute of the Mdisk not repeated; and

in response to a requirement of an upper-layer host application for LUNs with same performance, making numbers and capacities of the Mdisks that form the LUNs the same.

6. The method according to claim 1 , wherein connections between the storage enclosures and between the storage enclosures and the controller are implemented by SAS connections.

7. The method according to claim 1 , wherein the Mdisks that form the LUNs are identified as Mdisk [Cn, Em], where Cn represents an n th controller port identifier, and Em represents an m th storage enclosure identifier.

8. A Logical Unit Number (LUN) division device, comprising:

a memory, configured to store a computer program; and

a processor, configured to execute the computer program to implement operations comprising:

checking and adjusting a connection manner and number of Serial Attached Small Computer System Interface (SCSI) (SAS) connections of storage enclosures and a controller, so as to make a maximum output bandwidth of each storage enclosure consistent;

querying controller port identifiers and storage enclosure identifiers;

creating a Mdisk array, and adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk;

logically dividing a storage space in the Mdisk array to create a volume, and dividing the volume into LUNs, wherein Mdisks that form the LUNs are made to come from different storage enclosures and different controller ports; and

mapping the LUNs to a host.

9. The device according to claim 8 , wherein the querying controller port identifiers and storage enclosure identifiers comprises:

querying the controller port identifier controller_id based on a system command lscontroller, and querying the storage enclosure identifier enclosure_id based on a system command lsenclosure.

10. The device according to claim 8 , wherein the operations further comprise:

after the Mdisk array is created, adding the Mdisk array to a storage pool, and specifying a level of a Redundant Array of Independent Disks (RAID) in the Mdisk array based on a system command.

11. The device according to claim 8 , wherein the adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk comprises:

modifying an attribute of the Mdisk based on a system command charray to add the corresponding controller port identifier and the corresponding storage enclosure identifier to the Mdisk.

12. The device according to claim 8 , wherein the making Mdisks that form the LUNs come from different storage enclosures and different controller ports comprises:

making the storage enclosure identifier in an attribute of the Mdisk not repeated and the controller port identifier in the attribute of the Mdisk not repeated; and

in response to a requirement of an upper-layer host application for LUNs with same performance, making numbers and capacities of the Mdisks that form the LUNs the same.

13. The device according to claim 8 , wherein connections between the storage enclosures and between the storage enclosures and the controller are implemented by SAS connections.

14. The device according to claim 8 , wherein the Mdisks that form the LUNs are identified as Mdisk [Cn, Em], where Cn represents an n th controller port identifier, and Em represents an m th storage enclosure identifier.

15. A non-transitory readable storage medium, storing a computer program which, when executed by a processor, causes the processor to implement operations comprising:

checking and adjusting a connection manner and number of Serial Attached Small Computer System Interface (SCSI) (SAS) connections of storage enclosures and a controller, so as to make a maximum output bandwidth of each storage enclosure consistent;

querying controller port identifiers and storage enclosure identifiers;

creating a Mdisk array, and adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk;

logically dividing a storage space in the Mdisk array to create a volume, and dividing the volume into LUNs, wherein Mdisks that form the LUNs are made to come from different storage enclosures and different controller ports; and

mapping the LUNs to a host.

16. The non-transitory readable storage medium according to claim 15 , wherein the querying controller port identifiers and storage enclosure identifiers comprises:

querying the controller port identifier controller_id based on a system command lscontroller, and querying the storage enclosure identifier enclosure_id based on a system command lsenclosure.

17. The non-transitory readable storage medium according to claim 15 , wherein the operations further comprise:

after the Mdisk array is created, adding the Mdisk array to a storage pool, and specifying a level of a Redundant Array of Independent Disks (RAID) in the Mdisk array based on a system command.

18. The non-transitory readable storage medium according to claim 15 , wherein the adding the corresponding controller port identifier and the corresponding storage enclosure identifier for each Mdisk comprises:

modifying an attribute of the Mdisk based on a system command charray to add the corresponding controller port identifier and the corresponding storage enclosure identifier to the Mdisk.

19. The non-transitory readable storage medium according to claim 15 , wherein the making Mdisks that form the LUNs come from different storage enclosures and different controller ports comprises:

making the storage enclosure identifier in an attribute of the Mdisk not repeated and the controller port identifier in the attribute of the Mdisk not repeated; and

in response to a requirement of an upper-layer host application for LUNs with same performance, making numbers and capacities of the Mdisks that form the LUNs the same.

20. The non-transitory readable storage medium according to claim 15 , wherein connections between the storage enclosures and between the storage enclosures and the controller are implemented by SAS connections.