Techniques for redirecting input/output

Patent metadata

Field	Value
Publication number	US-9612852-B1
Application number	US-201213718805-A
Country	US
Kind code	B1
Filing date	Dec 18, 2012
Priority date	Dec 18, 2012
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

Techniques for redirecting input/output are disclosed. In one particular embodiment, the techniques may be realized as a method for redirecting input/output comprising the steps of method for redirecting input/output comprising configuring a first virtual machine with a recorder for library interposition, configuring a replica virtual machine with a player for library interposition, receiving a first recorded event from the first virtual machine, and transferring the first recorded event to the replica virtual machine for replay.

First claim

The invention claimed is:

1. A computer-implemented method for redirecting input/output comprising:
configuring a first virtual machine with a recorder for library interposition;
configuring a replica virtual machine with a player for library interposition;
receiving a first recorded event from the first virtual machine; and
transferring, via an input/output redirection module, the first recorded event to the replica virtual machine for replay,
wherein the replica virtual machine further comprises an interpose player configured to send read requests to an executable program and receive socket input requests from the executable program, and
wherein the replica virtual machine further comprises a replica system library, the replica system library comprising libc as a standard C library and configured to receive and process the socket input requests from the interpose player.

2. The computer-implemented method of claim 1 , further comprising receiving a subsequent recorded event from the first virtual machine after the first recorded event was transferred for replay.

3. The computer-implemented method of claim 1 , further comprising:
configuring a plurality of replica virtual machines, wherein each replica virtual machine of the plurality of replica virtual machines is configured with a player of a plurality of players for library interposition; and
transferring the first recorded event to at least two replica virtual machines of the plurality of replica virtual machines for replay,
wherein the first recorded event is transferred to the at least two replica virtual machines of the plurality of replica virtual machines concurrently for replay.

4. The computer-implemented method of claim 1 , wherein the first virtual machine comprises a first architecture, and wherein the replica virtual machine comprises a second architecture different from the first architecture.

5. The computer-implemented method of claim 1 , wherein the first recorded event is a network-based input/output event.

6. The computer-implemented method of claim 1 , wherein the first recorded event is transferred through a local pipe.

7. The computer-implemented method of claim 1 , wherein the first recorded event is transferred through a network pipe.

8. The computer-implemented method of claim 1 , wherein the first recorded event comprises a data transmission associated with the event.

9. A system for redirecting input/output comprising:
one or more hardware processors communicatively coupled to a network; wherein the one or more hardware processors are configured to:
configure a first virtual machine with a recorder for library interposition;
configure a replica virtual machine with a player for library interposition;
receive a first recorded event from the first virtual machine; and
transfer the first recorded event to the replica virtual machine for replay,
wherein the replica virtual machine further comprises an interpose player configured to send read requests to an executable program and receive socket input requests from the executable program, and
wherein the replica virtual machine further comprises a replica system library, the replica system library comprising libc as a standard C library and configured to receive and process the socket input requests from the interpose player.

10. The system of claim 9 , wherein the one or more hardware processors are further configured to receive a subsequent recorded event from the first virtual machine after the first recorded event was transferred for replay.

11. The system of claim 9 , wherein the one or more hardware processors are further configured to:
configure a plurality of replica virtual machines, wherein each replica virtual machine of the plurality of replica virtual machines is configured with a player of a plurality of players for library interposition; and
transfer the first recorded event to at least two replica virtual machines of the plurality of replica virtual machines for replay,
wherein the first recorded event is transferred to the at least two replica virtual machines of the plurality of replica virtual machines concurrently for replay.

12. The system of claim 9 , wherein the first recorded event is a network-based input/output event.

13. The system of claim 9 , wherein the first recorded event is transferred through a network pipe.

14. The system of claim 9 , wherein the first recorded event comprises a data transmission associated with the event.

15. An article of manufacture for redirecting input/output, the article of manufacture comprising:
at least one non-transitory processor readable storage medium; and
instructions stored on the at least one medium;
wherein the instructions are configured to be readable from the at least one medium by at least one processor and thereby cause the at least one processor to operate so as to:
configure a first virtual machine with a recorder for library interposition;
configure a replica virtual machine with a player for library interposition;
receive a first recorded event from the first virtual machine; and
transfer the first recorded event to the replica virtual machine for replay,

wherein the replica virtual machine further comprises an interpose player configured to send read requests to an executable program and receive socket input requests from the executable program, and
wherein the replica virtual machine further comprises a replica system library, the replica system library comprising libc as a standard C library and configured to receive and process the socket input requests from the interpose player.

16. The article of manufacture of claim 15 , wherein the instructions cause the at least one processor to operate further so as to receive a subsequent recorded event from the first virtual machine after the first recorded event was transferred for replay.

17. The article of manufacture of claim 15 , wherein the instructions cause the at least one processor to operate further so as to:
configure a plurality of replica virtual machines, wherein each replica virtual machine of the plurality of replica virtual machines is configured with one player of a plurality of players for library interposition; and
transfer the first recorded event to the plurality of replica virtual machines for replay,
wherein the first recorded event is transferred to each replica virtual machine of the plurality of replica virtual machines concurrently for replay.

18. The article of manufacture of claim 15 , wherein the first recorded event is a network-based input/output event.

19. The article of manufacture of claim 15 , wherein the first recorded event is transferred through a network pipe.

20. The article of manufacture of claim 15 , wherein the first recorded event comprises a data transmission associated with the event.

Assignees

• Veritas Technologies Llc

Inventors

• Benameur Azzedine
• Evans Nathan S

Classifications

• G06F9/45533 Primary

  Hypervisors; Virtual machine monitors · CPC title

• G06F11/3688

  for test execution, e.g. scheduling of test suites · CPC title

• G06F9/455 Primary

  Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines · CPC title

• G06F11/3698

  Environments for analysis, debugging or testing of software · CPC title

• Y02D10/00

  Energy efficient computing, e.g. low power processors, power management or thermal management · CPC title