Apparatus, system, and method for an in-server storage area network

• US 8,495,292 B2
• Filed: 12/06/2007
• Issued: 07/23/2013
• Est. Priority Date: 12/06/2006
• Status: Active Grant

• Current Assignee: Jpmorgan Chase Bank NA As The Agent
• Original Assignee: Fusion-IO Incorporated (Western Digital Corporation)
• Inventors: Flynn, David, Atkisson, David, Lagerstedt, Bert, Strasser, John, Thatcher, Jonathan, Zappe, Michael
• Primary Examiner(s): Dudek, Jr., Edward
• Assistant Examiner(s): DARE, RYAN A
• Application Number:
  US11/952,106
• Publication Number:
  US 20080140932A1
• Time in Patent Office: 2,056 Days
• Field of Search: None
• US Class Current: 711/114
• CPC Class Codes: G06F 1/183 Internal mounting support structures, e.g. for printed circuit boards, internal connecting means for buses G06F13/409
• CPC Class Codes: G06F 11/108 Parity data distribution in semiconductor storages, e.g. in SSD
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 12/0804 with main memory updating G06F12/0806 takes precedence
• CPC Class Codes: G06F 12/0868 Data transfer between cache memory and other subsystems, e.g. storage devices or host systems
• CPC Class Codes: G06F 12/12 Replacement control
• CPC Class Codes: G06F 12/121 using replacement algorithms
• CPC Class Codes: G06F 12/123 with age lists, e.g. queue, most recently used [MRU] list or least recently used [LRU] list
• CPC Class Codes: G06F 13/28 using burst mode transfer, e.g. direct memory access DMA, cycle steal G06F13/32 takes precedence
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: G06F 13/426 using an embedded synchronisation, e.g. Firewire bus, Fibre Channel bus, SSA bus
• CPC Class Codes: G06F 2211/002 Bus
• CPC Class Codes: G06F 2211/103 Hybrid, i.e. RAID systems with parity comprising a mix of RAID types
• CPC Class Codes: G06F 2212/1032 Reliability improvement, data loss prevention, degraded operation etc
• CPC Class Codes: G06F 2212/1044 Space efficiency improvement
• CPC Class Codes: G06F 2212/2022 Flash memory
• CPC Class Codes: G06F 2212/222 Non-volatile memory
• CPC Class Codes: G06F 2212/70 Details relating to dynamic memory management
• CPC Class Codes: G06F 2212/7203 Temporary buffering, e.g. using volatile buffer or dedicated buffer blocks
• CPC Class Codes: G06F 2212/7205 Cleaning, compaction, garbage collection, erase control
• CPC Class Codes: G06F 2212/7208 : Multiple device management, e.g. distributing data over multiple flash devices
• CPC Class Codes: G06F 3/0604 : Improving or facilitating administration, e.g. storage management
• CPC Class Codes: G06F 3/0608 : Saving storage space on storage systems
• CPC Class Codes: G06F 3/0613 : in relation to throughput
• CPC Class Codes: G06F 3/0619 : in relation to data integrity, e.g. data losses, bit errors
• CPC Class Codes: G06F 3/0643 : Management of files
• CPC Class Codes: G06F 3/065 : Replication mechanisms
• CPC Class Codes: G06F 3/0652 : Erasing, e.g. deleting, data cleaning, moving of data to a wastebasket
• CPC Class Codes: G06F 3/0656 : Data buffering arrangements
• CPC Class Codes: G06F 3/0659 : Command handling arrangements, e.g. command buffers, queues, command scheduling
• CPC Class Codes: G06F 3/0679 : Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
• CPC Class Codes: G06F 3/0685 : Hybrid storage combining heterogeneous device types, e.g. hierarchical storage, hybrid arrays
• CPC Class Codes: G06F 3/0688 : Non-volatile semiconductor memory arrays
• CPC Class Codes: G06F 9/52 : Program synchronisation; Mutual exclusion, e.g. by means of semaphores
• CPC Class Codes: G06F 9/54 : Interprogram communication
• CPC Class Codes: H04L 67/02 : based on web technology, e.g. hypertext transfer protocol [HTTP]
• 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]
• CPC Class Codes: H05K 7/1444 : Complex or three-dimensional-arrangements; Stepped or dual mother boards
• CPC Class Codes: H05K 7/1487 : Blade assemblies, e.g. blade cases or inner arrangements within a blade
• CPC Class Codes: Y02D 10/00 : Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

An apparatus and system are disclosed for an in-server storage area network (“SAN”). A first storage controller is included within a first server. The first storage controller controls at least one storage device. The first server includes a network interface shared by the first server and the first storage controller. A storage communication module is included that facilitates communication between the first storage controller and at least one device external to the first server, where the communication between the first storage controller and the external device is independent from the first server. An in-server SAN module is included that services a storage request using at least one of a network protocol and a bus protocol. The in-server SAN module services the storage request independent from the first server, the service request received from a client.

Claims

1. An apparatus for an in-server storage area network (“

SAN”

), the apparatus comprising;

a server configured to connect to a network;

a storage controller housed by the server, the storage controller configured to control at least one storage device housed by the server;

a storage communication module of the storage device, the storage communication module configured to facilitate communication between the storage controller and at least one device external to the server using the network, the storage controller configured to communicate with the at least one external device independent from the server; and

an in-server SAN module of the storage device, the in-server SAN module configured to service a first storage request received from the server and to service a second storage request received from the at least one external device by way of the network, the in-server SAN module configured to receive and service the second storage request independent from the server.

2. The apparatus of claim 1, further comprising:

a network interface configured to connect to the network and to be shared by the server and the storage controller, wherein the server is configured to communicate with a computer using the network interface over the network independent of the storage controller and the storage controller is configured to communicate with the at least one external device using the network interface over the network independent of the server; and

a common interface module configured to configure the network interface, the storage controller, and the server such that the server and the storage controller are accessible using a shared network address.

3. The apparatus of claim 1, wherein the storage controller is a first storage controller and another device external to the server comprises a second storage controller and wherein the in-server SAN module is configured to service the second storage request using communication through the network and between the first and second storage controllers independent of the server.

4. The apparatus of claim 3, wherein the second storage controller is within a second server.

5. The apparatus of claim 3, wherein the second storage controller is located in a device other than a second server.

6. The apparatus of claim 3, further comprising a network interface configured to connect to the network and to be shared by the server and the storage controller and a system bus configured to use a protocol allowing extension beyond the server wherein the network interface is part of the system bus and wherein the first storage controller is configured to communicate with the second storage controller over the system bus.

7. The apparatus of claim 3, wherein the in-server SAN module is configured to receive the first storage request from the server by way of a bus internal to the apparatus.

8. The apparatus of claim 1, wherein the at least one external device comprises a client and the second storage request originates with the client, wherein the storage controller is configured as at least part of a SAN and the in-server SAN module is configured to service the second storage request through the network independent of the server.

9. The apparatus of claim 8, wherein the in-server SAN module is configured to service storage requests from the client when the server is unavailable.

10. The apparatus of claim 1, wherein the storage controller is configured to communicate with a client external to the server over the network.

11. The apparatus of claim 1, wherein the storage controller is configured to communicate with a client over a system bus.

12. The apparatus of claim 11, further comprising a network interface configured to connect to the network and to be shared by the server and the storage controller wherein the client is external to the server and the system bus comprises a protocol allowing extension beyond the server and the network interface is part of the system bus.

13. The apparatus of claim 1, further comprising a NAS module configured to configure the storage controller as a network attached storage (“

NAS”

) device for at least one client and to service file requests from the at least one client.

14. The apparatus of claim 1, further comprising a DAS module configured to configure at least a portion of the at least one storage device controlled by the storage controller as a direct attached storage (“

DAS”

) device attached to the server for servicing storage requests from at least one client through the server.

15. The apparatus of claim 1, wherein the storage controller comprises a solid-state storage controller and the at least one storage device controlled by the storage controller comprises solid-state storage.

16. The apparatus of claim 1, wherein the second storage request comprises an object request and the storage controller is configured to manage one or more objects.

17. The apparatus of claim 1, further comprising a link setup module configured to establish a communication link between the storage controller and the at least one external device, the communication link configured to allow communication independent from control of the server between the storage controller and the at least one external device, the communication link sufficient for servicing the second storage request, the at least one external device comprising one of a client and a second storage controller.

18. The apparatus of claim 17, wherein the link setup module is configured to establish the communication link as an initialization process, wherein further communication over the communication link is independent of the link setup module.

19. The apparatus of claim 1, further comprising a proxy module configured to direct at least a portion of commands used in servicing a storage request through the server, the commands comprising a portion of the second storage request, wherein at least data associated with the second storage request is communicated between the storage controller and the at least one external device independent of the server.

20. The apparatus of claim 1, wherein the storage controller is configured to service a storage request sent from a client through a second storage controller, the second storage controller and the client external to the server.

21. The apparatus of claim 1, further comprising a virtual bus module configured to allow one or more servers within the server to independently access one or more storage controllers through separate virtual buses.

22. The apparatus of claim 21, wherein the virtual buses are created using a peripheral component interconnect express input/output virtualization (“

PCIe-IOV”

).

23. The apparatus of claim 21, wherein one or more servers external to the server are configured to independently access the one or more storage controllers through separate virtual buses.

24. The apparatus of claim 1, wherein the storage controller is a first storage controller and further comprising a front-end RAID module configured to configure two or more storage controllers as a redundant array of independent drives (“

RAID”

), the second storage request comprising a request to store data, the front-end RAID module configured to service the second storage request by writing the data to the RAID consistent with a RAID level, wherein the two or more storage controllers comprise at least the first storage controller and a second storage controller.

25. The apparatus of claim 1, further comprising a back-end RAID module configured to configure two or more storage devices controlled by the storage controller as a RAID, the second storage request comprising a request to store data, the back-end RAID module configured to service the second storage request by writing the data to the RAID consistent with a RAID level, wherein the storage devices configured as a RAID are configured to be accessed by the at least one external device as a single storage device controlled by the storage controller.

26. A system for an in-server storage area network (“

SAN”

), the system comprising;

a first server configured to send a first storage request;

a first storage controller housed by the first server, the first storage controller configured to control at least one storage device housed by the first server;

a network interface shared by the first server and the first storage controller, the network interface configured to connect the first server and the first storage controller to a network;

a storage communication module housed by the first server, the storage communication module configured to facilitate communication between the first storage controller and at least one device external to the first server, the first storage controller configured to communicate with the at least one external device independent from the first server; and

an in-server SAN module housed by the first server, the in-server SAN module configured to service the first storage request received from the first server and to service a second storage request received from the at least one external device by way of the network, the in-server SAN module configured to receive and service the second storage request independent from the first server.

27. The system of claim 26, wherein the first server is configured to communicate with a computer using the network interface independent of the storage controller and the storage controller is configured to communicate with the at least one external device using the network interface independent of the server.

28. The system of claim 26, wherein the first server comprises a blade server and further comprising a computer rack comprising the first server and a second server that includes at least one second storage controller and at least one storage device, the at least one second storage controller configured to control the at least one storage device.