Applications for networked storage systems

• US 7,113,984 B1
• Filed: 07/24/2000
• Issued: 09/26/2006
• Est. Priority Date: 06/02/2000
• Status: Expired due to Term

• Current Assignee: Ciena Corporation
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Stark, Ryan, Bell, John H., Chmara, Thomas P., Wallace, R. Bruce, Townsend, Bruce L.
• Primary Examiner(s): Donaghue, Larry D.
• Application Number:
  US09/624,051
• Time in Patent Office: 2,255 Days
• Field of Search: 709/212, 709/213, 709/217, 709/220, 709/230, 370/399, 370/466
• US Class Current: 709/220
• CPC Class Codes: G06F 16/00 Information retrieval; Database structures therefor; File system structures therefor
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• 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

At least one network device that moves storage blocks based upon a session layer or higher protocol set is employed to facilitate communication between at least one host and at least one target storage device. The at least one network device may include a server and a switch. Transactions related to data storage access are expressed in a non-network protocol and transmitted via a network protocol data unit across at least a portion of the network by employing encapsulation. An adapter card associated with the data storage unit is employed to extract the non-network protocol transaction. Multiple, mirrored data storage units that are separated by relatively large physical distance may be employed to reduce the likelihood of catastrophic data loss due to an event such as a fire. Further, READ transactions may be facilitated by preloading data storage units with READ metadata for subsequent transmission to a client device to enable expedited access to data stored on the data storage units.

Claims

1. A method for facilitating operations related to data storage between a first device and at least one data storage unit in a computer network, comprising the steps of:

duplicating selected metadata from the at least one data storage unit to the first device, wherein the selected metadata describes a location of data stored on the data storage unit;

causing generation of a storage services protocol transaction to access the data stored on the data storage unit and described by the selected metadata, wherein the generation is responsive to the selected metadata duplicated to the first device;

encapsulating the storage services protocol transaction into a payload portion of at least one network protocol data unit;

processing the at least one network protocol data unit based on a storage services protocol set to facilitate transmission of the at least one network protocol data unit to the at least one data storage unit, wherein the processing is performed at a switch located in the computer network;

extracting the storage services protocol transaction from the at least one network protocol data unit; and

operating upon the storage services protocol transaction.

2. The method of claim 1 wherein said processing step includes the further step of balancing loads associated with selected read transactions.

3. The method of claim 1 wherein said processing step includes the further step of duplicating data units associated with selected write transactions to achieve mirroring.

4. The method of claim 1 wherein said processing step includes the further step of duplicating data units associated with selected transactions to achieve N-way mirroring.

5. The method of claim 1 wherein said processing step includes the further step of ensuring right to access based on originator.

6. The method of claim 1 wherein said processing step includes the further step of blocking access to selected destinations.

7. The method of claim 1 wherein said processing step includes the further step of monitoring and logging access.

8. The method of claim 7 wherein said processing step includes the further step of employing results from access monitoring and logging to detect unauthorized intrusion.

9. Apparatus that facilitates operations related to data storage between a first device and at least one data storage unit in a computer network, comprising:

a file system that indicates location of data stored on at least one data storage unit;

circuitry that duplicates selected metadata from the at least one data storage unit to the first device, wherein the selected metadata describes the location of the data stored on the at least one data storage unit;

circuitry that processes at least one network protocol data unit associated with the operations based on storage services protocol set information to facilitate transmission of the network protocol data unit to the at least one data storage unit, wherein said processing of the network protocol data unit includes encapsulating a storage services protocol transaction into a payload portion of each of the network protocol data unit, wherein the storage services protocol transaction is to access the data stored on the data storage unit and described by the selected metadata, and wherein the storage services protocol transaction is generated in response to the selected metadata duplicated to the first device.

10. The apparatus of claim 9 wherein said circuitry balances loads associated with selected read transactions.

11. The apparatus of claim 9 wherein said circuitry duplicates data units associated with selected write transactions to achieve mirroring.

12. The apparatus of claim 9 wherein said circuitry duplicates data units associated with selected transactions to achieve N-way mirroring.

13. The apparatus of claim 9 wherein said circuitry facilitates ensuring right to access based on originator.

14. The apparatus of claim 9 wherein said circuitry blocks access to selected destinations.

15. The apparatus of claim 9 wherein said circuitry monitors and logs access.

16. The apparatus of claim 15 wherein said circuitry employs results from access monitoring and logging to detect unauthorized intrusion.