Secondary data storage and recovery system

• US 7,698,401 B2
• Filed: 06/01/2004
• Issued: 04/13/2010
• Est. Priority Date: 06/01/2004
• Status: Expired due to Fees

• Current Assignee: InMage Systems, Inc. (Microsoft Corporation)
• Original Assignee: InMage Systems, Inc. (Microsoft Corporation)
• Inventors: Kumar, Srihari Sampath, Neelamraju, Srinivasarao, Atluri, Rajeev, Inala, Sam, Tirumala, Anup S.
• Primary Examiner(s): WANG, LIANG CHE A
• Application Number:
  US10/859,368
• Publication Number:
  US 20060031468A1
• Time in Patent Office: 2,142 Days
• Field of Search: 709/213, 709/216, 709/223, 709/229, 709/249, 709/220, 709/237
• US Class Current: 709/223
• CPC Class Codes: G06F 11/1453 using de-duplication of the data
• CPC Class Codes: G06F 11/1456 Hardware arrangements for backup
• CPC Class Codes: G06F 11/1464 for networked environments
• CPC Class Codes: G06F 11/1471 involving logging of persistent data for recovery
• CPC Class Codes: H04L 67/1095 Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
• 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

A system for providing secondary data storage and recovery services for one or more networked host nodes has a server application for facilitating data backup and recovery services; at least one client application for facilitating host node configuration to receive services; a secondary data storage medium; and at least one mechanism for passive acquisition of data from the one or more host nodes for storage into the secondary data storage medium by the server application. In a preferred embodiment secondary storage is streamlined through continuous data backup and enhanced by elimination of redundant write data.

Claims

1. A system to provide secondary data storage and recovery services to at least one networked host node storing data in an array of primary storage devices each coupled to the at least one host node by dedicated data paths, comprising:

a host node to connect at least one of a primary storage device and a secondary storage subsystem to a network to acquire data;

the primary storage to store the data generated by the host node;

the secondary storage subsystem including a server executing a server application managing data backup and recovery services by the secondary storage subsystem, wherein the secondary storage subsystem is comprised of at least one of a dedicated server node and a PC node, and wherein the data is received by at least one of a specially adapted line card installed in the secondary storage subsystem and a network adaptor card; and

at least one data path splitter installed one per dedicated data path existing between the at least one host and the primary storage device, wherein the splitter mirrors data transmitted in the dedicated data paths, and streams the mirrored data to the secondary storage subsystem, wherein the data path splitter is comprised of a hardware data splitter of at least one of an optical type and an electrical type, depending on the type of network line used.

2. The system of claim 1 wherein the networked host nodes are connected to a local area network (LAN).

3. The system of claim 2 implemented in conjunction with a storage area network (SAN) and the LAN hosts through a fibre channel switch.

4. The system of claim 2 implemented in conjunction with a SAN and the LAN hosts through an Ethernet hub.

5. The system of claim 1 wherein the host nodes are a mix of personal computers (PCs) and server nodes.

6. The system of claim 1 wherein the secondary storage medium is one of a serial-advanced-technology-attachment (SATA) or parallel-advanced-technology attachment (PATA) drive system.

7. The system of claim 1 further comprising a client application, wherein the client application includes a component for creating and sending metadata along with physical data for secondary storage backup.

8. The system of claim 7 wherein the server application includes a component for receiving data from a data acquisition mechanism, a component for validating the write portion of the data received using metadata comparison of received metadata with stored metadata, and a component for compressing the validated data for write to the secondary storage medium.

9. The system of claim 8 wherein the component for receiving data from the data acquisition mechanism is a line card dedicated as receive only.

10. The system of claim 1 further including a tape-drive system for long term backup of secondary storage data.

11. The system of claim 1 wherein a host node is comprised of a data path splitter.

12. The system of claim 1 further comprising a cache memory system of a hardware host used to prepare data to store in secondary storage.

13. The system of claim 1 wherein data stored in secondary storage is converted using at least one of a sparse file utility and a compression algorithm.

14. The system of claim 1 wherein a portion of the server application comprises firmware installed on a field programmable gate array (FPGA) supported by a line card, and wherein the firmware includes a frame rate detection engine to adjust performance of the line card to an actual frame rate of data being received on the line card.

15. The system of claim 1 wherein the server application is comprised of server software and line card-based software.

16. The system of claim 1 wherein data stored in secondary storage is viewable as volume block data, file system data, and application level data.

17. The system of claim 1 wherein a data change is stored in secondary storage as a distinct and time stamped version from other changes to a data block to provide revision selectable and time-based recovery of data.

18. The system of claim 1 further comprising a host activity monitor to track boot and task activity.

19. The system of claim 1 further comprising a metadata generation utility instance to generate metadata associated with a task occurring within the at least one networked node.

20. The system of claim 1 wherein a metadata comparison is performed at a host prior to completion of a write operation to prevent a redundant save.

21. The system of claim 1 wherein metadata is created in a host and is received by the secondary storage subsystem after an associated data frame.

22. The system of claim 1 wherein the system to provide secondary data storage and recovery services is provided as a remote service accessible over a network.

23. A method of configuring at least one networked host node to provide secondary data storage and recovery services, wherein the at least one networked host node stores data in an array of primary storage devices each coupled to the at least one host node by dedicated data paths, the method comprising:

configuring a secondary storage sub-system including a server executing a server application managing data backup and recovery services by the secondary storage subsystem, wherein the secondary storage sub-system is comprised of at least one of a dedicated server node and a PC node, and wherein the data is received by at least one of a specially adapted line card installed in the secondary storage sub-system and a network adaptor card; and

configuring at least one data path splitter installed one per dedicated data path existing between the one or more hosts and a primary storage device, wherein the splitter mirrors data transmitted in the dedicated data paths, and streams the mirrored data to the secondary storage subsystem, wherein the at least one data path splitter is comprised of at least one hardware data splitter of at least one of an optical type and an electrical type, depending on the type of network line used.

24. The method of claim 23, wherein the networked host nodes are connected to a local area network (LAN).

25. The method of claim 23, wherein the host nodes are a mix of personal computers (PCs) and server nodes.

26. The method of claim 24, implemented in conjunction with a storage area network (SAN) and the LAN hosts through a fibre channel switch.

27. The method of claim 24, implemented in conjunction with a SAN and the LAN hosts through an Ethernet hub.

28. A method comprising:

providing secondary data storage and recovery services to at least one networked host node storing data in an array of primary storage devices each coupled to the at least one host node by dedicated data paths;

executing a server application managing data backup and recovery services using a secondary storage subsystem including a server;

wherein a secondary storage subsystem is comprised of at least one of a dedicated server node and a PC node, and wherein the data is passively received by at least one of a specially adapted line card installed in the secondary storage subsystem and a network adaptor card;

mirroring data transmitted on a dedicated data path existing between the at least one host and a primary storage device using at least one splitter installed one per dedicated data path, wherein the at least one data path splitter is comprised of at least one hardware data splitter of at least one of an optical type and an electrical type, depending on the type of network line used.; and

streaming the mirrored data to the secondary storage subsystem.

29. The method of claim 28 wherein the networked host nodes are connected to a local area network (LAN).

30. The method of claim 28 wherein the host nodes are a mix of personal computers (PCs) and server nodes.

31. The method of claim 29, implemented in conjunction with a storage area network (SAN) and the LAN hosts through a fibre channel switch.