Open format storage subsystem apparatus and method

• US 6,829,685 B2
• Filed: 11/15/2001
• Issued: 12/07/2004
• Est. Priority Date: 11/15/2001
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Recio, Renato John, Pfister, Gregory Francis, Neal, Danny Marvin
• Primary Examiner(s): Nguyen, Hiep T.
• Application Number:
  US09/999,143
• Publication Number:
  US 20030093627A1
• Time in Patent Office: 1,118 Days
• Field of Search: 711/153, 711/163, 711/173, 710/316
• US Class Current: 711/153
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0644 Management of space entities, e.g. partitions, extents, pools
• CPC Class Codes: G06F 3/067 Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
• CPC Class Codes: G06F 3/0689 Disk arrays, e.g. RAID, JBOD
• CPC Class Codes: H04L 67/1097 for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

Abstract

An open format storage subsystem and method are provided. The storage subsystem and method include at least one host endnode, at least one processing unit endnode, and at least one storage endnode. These endnodes are partitioned according to partition tables assigned to the ports of the endnodes and partition keys assigned to queue pairs of the ports. Based on these partition keys, partitions in the storage subsystem are designated. In this way, certain endnodes may be designated as being able to communicate with only certain other ones of the endnodes. Because of the partitioning mechanism of the present invention, an open format storage subsystem is formulated such that the types of endnodes in the storage subsystem are not limited to vendor specific units. This enhances the ability to add and remove units from the storage subsystem by removing the limitations typically found in closed storage subsystems.

Claims

1. A system, comprising:

one or more storage endnodes;

one or more processing unit endnodes coupled to the one or more storage endnodes;

at least one host endnode, wherein the one or more storage endnodes and the one or more processing unit endnodes constitute a storage partition, and wherein the at least one host endnode and the one or more processing unit endnodes constitute an access partition; and

wherein the partitions are defined by partition key tables assigned to the one or more storage endnodes, the one or more processing unit endnodes, and the at least one host endnode, such that the at least one host endnode accesses the one or more storage endnodes through the one or more processing unit endnodes based on the partitions defined in the partition key tables.

2. The system of claim 1, further comprising a system area network coupling the one or more processing unit endnodes to the at least one host endnode.

3. The system of claim 2, wherein the system area network is an InfiniBand system area network.

4. The system of claim 1, wherein the one or more storage endnodes include a set of storage media.

5. The system of claim 4, wherein the set of storage media is a set of non-system specific storage media.

6. The system of claim 1, wherein the one or more processing units are non-system specific processing units.

7. The system of claim 1, wherein the partition key tables assigned to the one or more storage endnodes, the one or more processing unit endnodes and the at least one host endnode are the same partition key table.

8. The system of claim 1, wherein the partition key tables include partition keys, and wherein the partition keys may be either limited partition keys or full partition keys.

9. The system of claim 8, wherein the at least one host endnode is assigned a limited partition key.

10. The system of claim 8, wherein the one or more processing endnodes are assigned full partition keys.

11. The system of claim 8, wherein the one or more storage endnodes are assigned full partition keys.

12. The system of claim 9, wherein the at least one host endnode is temporarily assigned a full partition key to thereby allow direct access to the one or more storage endnodes.

13. The system of claim 9, wherein endnodes with ful partition keys communicate with endnodes with full or limited keys and wherein endnodes with limited partition keys communicate with endnodes with full partition keys.

14. The system of claim 1, wherein the at least one host endnode and the one or more storage endnodes constitute a direct access partition.

15. The system of claim 1, wherein the partitions are enforced by partition identifiers assigned to the one or more storage endnodes, the one or more processing unit endnodes, and the at least one host endnode.

16. A method for forming a storage subsystem, comprising:

providing a plurality of partitionable units of various types, wherein the plurality of partitionable units comprises commodity components having at least one processing commodity component, at least one host component, and at least one storage commodity component; and

partitioning the plurality of partitionable units into a plurality of partitions such that at least one of the at least one processing commodity components exists in more than one partition, wherein partitioning includes assigning one or more partition key tables to the at least one storage commodity component, the at least one processing commodity component, and the at least one host component.

17. The method of claim 16, further comprising providing a system area network coupled to the plurality of partitionable units.

18. The method of claim 17, further comprising providing dedicated connections connecting at least some partitionable units in addition to or instead of the system area network.

19. The method of claim 17, wherein the system area network is an InfiniBand system area network.

20. The method of claim 16, wherein the one or more partition key tables are the same partition key table.

21. The method of claim 16, wherein the partition key tables include partition keys, and wherein the partition keys may be either limited partition keys or full partition keys.

22. The method of claim 21, wherein the at least one host component is assigned a limited partition key.

23. The method of claim 21, wherein the at least one processing commodity component is assigned a full partition key.

24. The method of claim 21, wherein the at least one storage commodity component is assigned a full partition key.

25. The method of claim 21, wherein the at least one host component is temporarily assigned a full partition key to thereby allow direct access to the at least one storage commodity component.

26. The method of claim 21, wherein components with full partition keys communicate with components with full or limited keys and wherein components with limited partition keys communicate with components with full partition keys.

27. The method of claim 16,wherein the partitions are enforced by partition identifiers assigned to the at least one storage commodity component, the at least one processing commodity component, and the at least one host component.

28. A method of forming a storage subsystem in a computer system, comprising:

assigning a host endnode to an access partition of the computer system;

assigning a storage endnode to a storage unit partition of the computer system; and

assigning a processing unit to both the storage unit partition and the access partition, such that the host endnode reads and writes data to the storage endnode via the processing unit due to the processing unit being in both the storage unit partition and the access partition, wherein assigning a host endnode to an access partition of the computer system includes assigning a first partition table to a port of the host endnode, and wherein assigning the processing unit to the access partition of the computer system includes assigning the first partition table to a first port of the processing unit.

29. The method of claim 28, wherein assigning the storage endnode to a storage unit partition includes assigning a second partition table to a port of the storage endnode, and wherein assigning the processing unit to the storage unit partition includes assigning the second partition table to a second port of the processing unit.

30. The method of claim 29, wherein the first and second partition tables include one or more partition keys.

31. The method of claim 30, wherein the partition keys maybe limited partition keys or full partition keys.

32. The method of claim 31, wherein assigning the storage endnode and the processing unit to a storage unit partition further includes assigning a pointer to a full partition key in the second partition table to a queue pair of the port of the storage endnode and a pointer to a full partition key in the second partition table to a queue pair of the second port of the processing unit.

33. The method of claim 31, wherein assigning the host endnode and the processing unit to the access partition further includes assigning a pointer to a limited partition key in the first partition table to a queue pair of the port of the host endnode and a pointer to a full partition key in the first partition table to a queue pair of the first port of the processing unit.

34. The method of claim 31, wherein endnodes with full partitiion keys communicate with endnodes with full or limited partition ksys and wherein endnodes with limited partition keys communicate with endnodes with full partition keys.

35. A computer program product in a computer readable medium for forming a storage subsystem in a computing system, comprising:

first instructions for assigning a host endnode to an access partition of the computer system;

second instructions for assigning a storage endnode to a storage unit partition of the computer system; and

third instructions for assigning a processing unit to both the storage unit partition and the access partition, such that the host endnode reads and writes data to the storage endnode via the processing unit due to the processing unit being in both the storage unit partition and the access partition, wherein the first instructions for assigning a host endnode to an access partition of the computer system include instructions for assigning a first partition table to a port of the host endnode, and wherein the third instructions for assigning the processing unit to the access partition of the computer system include instructions for assigning the first partition table to a first port of the processing unit.

36. The computer program product of claim 35, wherein the second instructions for assigning the storage endnode to a storage unit partition include instructions for assigning a second partition table to a port of the storage endnode, and wherein the third instructions for assigning the processing unit to the storage unit partition include instructions for assigning the second partition table to a second port of the processing unit.

37. The computer program product of claim 36, wherein the first and second partition tables include one or more partition keys.

38. The computer program product of claim 37, wherein the partition keys may be limited partition keys or full partition keys.

39. The computer program product of claim 38, wherein the second and third instructions for assigning the storage endnode and the processing unit to a storage unit partition further include instructions for assigning a pointer to a full partition key in the second partition table to a queue pair of the port of the storage endnode and instructions for assigning a pointer to a full partition key in the second partition table to a queue pair of the second port of the processing unit.

40. The computer program product of claim 39, wherein the first and third instructions for assigning the host endnode and the processing unit to the access partition further include instructions for assigning a pointer to a limited partition key in the first partition table to a queue pair of the port of the host endnode and instructions for assigning a pointer to a full partition key in the first partition table to a queue pair of the first port of the processing unit.

41. The computer program product of claim 38, wherein endnodes with full partition keys communicate with endnodes with full or limited partition keys and wherein endnodes with limited partition keys conimunicate with endnodes with full partition keys.