Method and system for accessing and managing virtual machines

• US 7,246,174 B2
• Filed: 10/28/2003
• Issued: 07/17/2007
• Est. Priority Date: 10/28/2003
• Status: Active Grant

• Current Assignee: NACON Consulting LLC (Syndicus Nacon)
• Original Assignee: NACON Consulting LLC (Syndicus Nacon)
• Inventors: Cottrell, Brian, Sabean, John, Sciandra, John R.
• Primary Examiner(s): NEURAUTER, GEORGE C
• Application Number:
  US10/695,467
• Publication Number:
  US 20050108709A1
• Time in Patent Office: 1,358 Days
• Field of Search: 709/203, 709/219, 709/244, 718/1, 718104- 5
• US Class Current: 709/244
• CPC Class Codes: G06F 9/505 considering the load
• CPC Class Codes: H04L 67/1001 for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/1036 Load balancing of requests to servers for services different from user content provisioning, e.g. load balancing across domain name servers

Abstract

A Virtual Access Core (VAC) manages and controls access to virtual machines. A Virtual Instruction Routine (VIR) protocol is used by all components of the system to pass instructions and information about a Virtual Session. The VAC issues commands in the VIR protocol language causing virtual machines to start and stop. A VIR host that hosts virtual machines responds to VAC commands. Web clients access the system via links, which a web server uses to send access requests to the VAC. The VAC responds by searching through process memory and database tables for information about free slots on a plurality of VIR hosts grouped into a Host Array. When one or more free slots have been identified, the VAC issues VIR Protocol commands instruction one or more VIR Hosts to load and start specific virtual machines in Specific Slots.

Claims

1. A method for allocating virtual machines among clients on a first network, comprising the steps of:

(a) providing an array of two or more host servers, each host server having a plurality of virtual machine slots available for allocation;

(b) receiving client requests for allocation of virtual machine slots;

(c) assigning virtual machine slots to clients, the virtual machine slots being distributed among the host servers in a second client network according to a load-balancing algorithm; and

(d) copying selected files from a file repository of requested virtual machine slots to a memory location assigned to a specific client.

2. The method of claim 1 wherein the step of receiving client requests further includes receiving the requests at a single IP address.

3. The method of claim 2 wherein the step of assigning virtual machine slots further includes assigning each virtual machine slot to only one client.

4. The method of claim 3, and further comprising the step of associating each client with a unique session identifier.

5. The method of claim 4, and further comprising the step of maintaining client access to its assigned virtual machine slots for the duration of the session.

6. The method of claim 5, and further comprising the step of monitoring the network for receipt of data from additional clients.

7. A computer program product comprising a computer usable medium having control login stored therein and residing on a server to permit allocating virtual machine slots among clients on a first network using an array of at least two host servers, each host server having a plurality of virtual machine slots available for allocation, said control logic comprising:

(a) computer readable program code means for receiving client requests for allocation of virtual machine slots;

(b) computer readable program code means for assigning virtual machine slots to clients, the virtual machine slots being distributed among the host servers in a second client network according to a load-balancing algorithm; and

(c) computer readable program means for instructing the at least two host servers to copy selected files from a file repository of requested virtual machine slots to a memory location assigned to a specific client.

8. The computer program product of claim 7, wherein the means for receiving client requests further includes means for receiving the requests at a single IP address.

9. The computer program product of claim 8, and further comprising means for associating each client with a unique session identifier.

10. The computer program product of claim 9, and further comprising means for maintaining client access to its assigned virtual machine slots for the duration of the session.

11. The computer program product of claim 10, and further comprising means for monitoring the first network for receipt of data from additional clients.

12. A system for allocating virtual machines among clients on a first network, comprising:

(a) a plurality of client computers connected to the first network;

(b) an array of two or more host servers, each server having a plurality of virtual machine slots available for allocation;

(c) a processor connecting the first network and the host servers, said processor including

(i) a port for receiving client requests for allocation of virtual machine slots and for providing connectivity between clients and allocated virtual machine slots,

(ii) an output connected to the host servers, and

(iii) means for distributing the allocated virtual machine slots among the host servers in a second client network according to a load-balancing algorithm.

13. The system of claim 12, wherein the host servers include a directory containing a copy of the virtual machine slots that have been assigned to the client computer.

14. The system of claim 12, wherein the host servers include a plurality of directories, each directory containing a copy of the virtual machine slots that have been assigned to a client computer, with each client computer having access to only that one directory.