Stateful applications operating in a stateless cloud computing environment

Patent metadata

Field	Value
Publication number	US-9645839-B2
Application number	US-91279810-A
Country	US
Kind code	B2
Filing date	Oct 27, 2010
Priority date	Oct 27, 2010
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A cloud computing environment may use a virtualization layer within a stateless cloud computing process to capture, store, and retrieve state information generated by a stateful application executing within the process. The virtualization layer may monitor various state storage systems to identify changes to stateful items and store the stateful items in a state storage mechanism. The virtualization layer may intercept and redirect calls to the stateful items stored in the state storage mechanism. A cloud computing manager may start and stop the stateless cloud computing process, and may recover the state and resume executing the application.

First claim

What is claimed is:

1. A method, implemented at a computer system that includes one or more processors, for operating a stateful application in a stateless environment, the method comprising:
starting a process that is stateless and that has a storage system associated therewith;
using the stateless process to execute an application that has state, wherein an initial state of the application was previously stored in a first storage object in the storage system, and wherein the application is first executed using the initial state stored in the first storage object;
registering the application with a virtualization layer of the computer system, wherein, upon completion of the registration, the virtualization layer is operable to monitor executable code that is associated with the application;
capturing, by the virtualization layer, a change to the initial state of the application wherein the capture to the change to the initial state of the application includes the following:
writing the change to the initial state of the application to a local storage area; and
periodically copying data stored in the local storage area and then writing the copied data to a second storage object in the storage system rather than writing the copied data to the first storage object, wherein the data that was copied and written at least includes the change to the initial state of the application, and wherein the initial state stored in the first storage object remains unchanged,
wherein, prior to executing the application, the computer system determines that the application has a network connection bandwidth that adversely impacts a performance of the application; and
in response to determining that the network connection bandwidth adversely impacts the performance of the application, create a copy of the initial state of the application and store the copy on the local storage area.

2. The method of claim 1 , wherein the stateless process operates on a virtual machine.

3. The method of claim 2 , wherein the stateless process operates in a datacenter.

4. The method of claim 1 , wherein the storage system that is associated with the stateless process comprises a virtual hard disk, and wherein the virtualization layer is configured to store the change to the initial state of the application on the virtual hard disk.

5. The method of claim 1 , wherein the application is stored in a package.

6. The method of claim 5 , wherein the package includes the change to the initial state of the application.

7. The method of claim 5 , wherein the change to the initial state of the application is separate from the package.

8. The method of claim 1 , wherein the method further comprises:
detecting a condition in which a plurality of processes that are executing on hardware of the computer system are determined to be in a state of low usage, wherein the stateless process that is executing the application is included within the plurality of processes; and
in response to detecting the condition, consolidating the plurality of processes such that the plurality of processes execute only on a subset of the hardware.

9. The method of claim 8 , wherein the consolidation of the plurality of processes at least includes the following:
storing a present state of the application on the storage system associated with the stateless process;
pausing the execution of the application;
pausing the stateless process;
restarting the paused stateless process on the subset of the hardware; and
restarting the paused application using the present state of the application that was previously stored on the storage system.

10. The method of claim 1 , wherein the stateless process is executing a first instance of the application, and wherein a second stateless process having a different storage system associated therewith is executing a second instance of the application.

11. The method of claim 10 , wherein both the storage system associated with the stateless process and the different storage system associated with the second stateless process are virtual hard disks, the virtual hard disk of the stateless process being independent and distinct from the virtual hard disk of the second stateless process.

12. The method of claim 11 , wherein the virtual hard disk of the stateless process and the virtual hard disk of the second stateless process were selected from a pool of virtual hard disks.

13. A computer system, comprising:
one or more processors; and
one or more computer-readable hardware storage devices having stored thereon computer-executable instructions that are executable by the one or more processors to cause the computer system to operate a stateful application in a stateless environment by causing the computer system to:
start a process that is stateless and that has a storage system associated therewith;
use the stateless process to execute an application that has state, wherein an initial state of the application was previously stored in a first storage object in the storage system, and wherein the application is first executed using the initial state stored in the first storage object;
register the application with a virtualization layer of the computer system, wherein, upon completion of the registration, the virtualization layer is operable to monitor executable code that is associated with the application;
use the virtualization layer to capture a change to the initial state of the application, wherein the capture to the change to the initial state of the application includes the following:
writing the change to the initial state of the application to a local storage area; and
periodically copying data stored in the local storage area and then writing the copied data to a second storage object in the storage system rather than writing the copied data to the first storage object, wherein the data that was copied and written at least includes the change to the initial state of the application, and wherein the initial state stored in the first storage object remains unchanged,
wherein, prior to executing the application, the computer system determines that the application has a network connection bandwidth that adversely impacts a performance of the application; and
in response to determining that the network connection bandwidth adversely impacts the performance of the application, create a copy of the initial state of the application and store the copy on the local storage area.

14. The system of claim 13 , wherein the computer-executable instructions further cause the computer system to create a virtual hard disk within the storage system that is associated with the stateless process.

15. The system of claim 14 , wherein the computer-executable instructions further cause the computer system to:
store the virtual hard disk at a predefined interval to create a plurality of versions of the virtual hard disk.

16. The system of claim 13 , wherein the system further comprises:
a sequencer that creates a package which includes both the application and the initial state of the application.

17. The system of claim 16 , wherein the initial state includes operating system registry settings and at least one configuration file change.

18. One or more hardware storage devices having thereon computer-executable instructions that are executable by one or more processors of a computer system to cause the computer system to operate a stateful application in a stateless environment by at least causing the computer system to:
start a process that is stateless and that has a storage system assoc

Assignees

• Jacobson Neil A
• Reierson Kristofer H
• Montgomery Andrew
• Microsoft Technology Licensing Llc

Inventors

• Jacobson Neil A
• Reierson Kristofer H
• Montgomery Andrew

Classifications

• G06F9/45533 Primary

  Hypervisors; Virtual machine monitors · CPC title