Server systems

• US 8,200,825 B2
• Filed: 02/27/2002
• Issued: 06/12/2012
• Est. Priority Date: 02/27/2001
• Status: Expired due to Term

• Current Assignee: Raritan Americas Incorporated (Legrand SA)
• Original Assignee: Raritan Computer Incorporated (Legrand SA)
• Inventors: Bates, Phil, Young, Jeremy, Moore, Paul, Dynan, Sean
• Primary Examiner(s): Meky, Moustafa M
• Assistant Examiner(s): KIM, HEE SOO
• Application Number:
  US10/479,392
• Publication Number:
  US 20050120116A1
• Time in Patent Office: 3,758 Days
• Field of Search: 709220-236, 709/246, 709/203, 709/217, 709/200, 710/31, 710/62, 710/100, 711/202, 340/825.8
• US Class Current: 709/227
• CPC Class Codes: H04L 67/08 specially adapted for terminal emulation, e.g. Telnet
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/10015 Access to distributed or replicated servers, e.g. using brokers
• CPC Class Codes: H04L 67/1023 based on a hash applied to IP addresses or costs
• CPC Class Codes: H04L 67/565 Conversion or adaptation of application format or content adding application control or application functional data H04L67/561
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols

Abstract

The present invention comprises a system for the control of multiple remote resources. A plurality of user stations, each comprising a keyboard, video screen and a mouse, communicate with a server management unit. The server management unit is comprised of a server chassis, matrix switch and a switch server. Remote resources are each connected to a port of a multiplexer or to a server interface. A user station connects to a remote resource by making a request to the server management unit. The switch server identifies the multiplexer or server interface port to which the resource is connected from a database. A request is made to a remote interface server connected to the multiplexer and server interfaces and the remote interface server connects the appropriate ports of the server management unit and the multiplexer or server interface.

Claims

1. A data processing system comprising:

at least one user station, for sending and receiving keyboard-video-mouse (KVM) signals;

a plurality of headless servers, wherein said headless servers provide output signals, but do not provide video format signals;

a plurality of remote interface servers for emulating video format signals of said headless servers by means of terminal emulation software;

a plurality of multiplexers for connecting at least one of the plurality of remote interface servers between said user station and a selected one of the headless servers wherein the user station communicates with a selected one of the headless servers via one of the plurality of multiplexers,

a database for mapping relationship information between the multiplexers and the plurality of headless servers, and

a switch server to communicate the relationship information to one of the remote interface servers, wherein the switch server is configured to select and make an automatic connection between the at least one user station and one of the plurality of remote interface servers, the one remote interface server being selected based on a type of resource requested by the at least one user station.

2. The system according to claim 1, wherein said connection between the at least one user station and said selected remote interface server is automatic and transparent to the at least one user station.

3. The system according to claim 1, further comprising a management unit,

wherein said management unit is configured to respond to requests from the at least one user station to automatically establish a connection from the at least one user station to a selected one of said headless servers via said selected remote interface server and said multiplexer.

4. The system according to claim 3, wherein said management unit communicates by a network protocol.

5. The system according to claim claim 3, wherein two or more of the remote interface servers are connected to network protocol connections, said network protocol connections being connected to said multiplexer.

6. The system according to claim 5, wherein said two or more remote interface servers communicate using a network protocol.

7. The system according to claim 1, wherein said multiplexer interfaces with a non-blocking switch arrangement.

8. The system according to claim 7, wherein said non-blocking switch arrangement comprises a matrix switch.

9. The system according to claim 8, wherein said matrix switch is controlled by the switch server in accordance with data stored in the database.

10. A data processing system for use with a plurality of remote headless servers, said system comprising:

one or more user interfaces, for sending and receiving data in a first form;

a plurality of interface servers for converting data from said first form to a second form by means of terminal emulation software, said second form being used by said remote headless servers for sending and receiving data;

a multiplexer for connecting one of said plurality of interface servers between one of said one or more user interfaces and one of said remote headless servers, wherein said first form of data comprises keyboard-video-mouse (KVM) signals,

a database for mapping relationship information between the multiplexer and the plurality of remote headless servers, and

a switch server for communicating the relationship information to one of the remote interface servers, wherein the switch server is configured to select and make an automatic connection between one of the one or more user interfaces and one of the plurality of interface servers, the one interface server being selected based on a type of resource requested by the at least one user station.

11. The system according to claim 10, including a management unit,

wherein said management unit is configured to respond to a request from said user interface to establish a connection from said one user interface to the one remote headless server via said remote interface server and said multiplexer.

12. The system according to claim 11, wherein said management unit communicates by a network protocol.

13. The system according to claim 11, wherein two or more of the interface servers are connected to network protocol connections, said network protocol connections being connected to said multiplexer.

14. The system according to claim 13, wherein said two or more interface servers communicate using a network protocol.

15. The system according to claim 10, wherein said multiplexer interfaces with a non-blocking switch arrangement.

16. The system according to claim 15, wherein said non-blocking switch arrangement comprises a matrix switch.

17. The system according to claim 16, wherein said matrix switch is controlled by the switch server in accordance with data stored in the database.

18. A method for operating a data processing system, said system comprising one or more user stations for sending and receiving keyboard-video-mouse signals (KVM), a plurality of servers which do not themselves provide video format signals, a plurality of remote interface servers, and a plurality of multiplexers connected to the plurality of servers, said method comprising the steps of:

detecting a request from a first user station requesting establishment of communication with a first server;

determining which one of the multiplexers is connected to the first server;

determining a resource availability of the plurality of remote interface servers;

selecting one remote interface server from the plurality of remote interface servers based on the determination of resource availability and based on a type of resource requested by said first user station;

establishing a first connection between said first user station and one of said remote interface servers ; and

establishing a second connection between said remote interface server and a desired one of said plurality of servers via a multiplexed network;

receiving data from said user station and said desired server at said remote interface server; and

emulating missing video signals of the desired server by means of terminal emulation software at said remote interface server for transmission to said user station.

19. The method according to claim 18, wherein said first connection is made via a matrix switch.

20. The method according to claim 19, wherein said second connection is made via a multiplexed network containing said servers and said remote interface server.