Method and system for monitoring a server

• US 20070055768A1
• Filed: 08/23/2005
• Published: 03/08/2007
• Est. Priority Date: 08/23/2005
• Status: Abandoned Application

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: O'Toole, James
• Application Number:
  US11/209,431
• Publication Number:
  US 20070055768A1
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 43/0817 by checking functioning

Abstract

A method, system, apparatus and machine-readable medium for monitoring a server in a network is provided. Based on a predefined condition, at least one reference value of the server is updated, the reference value being determined from a reference Uniform Resource Locator (URL). Subsequently, a test URL of the server is used to determine a test value of the server. The state of the server is determined, based on a comparison between the test value and the reference value.

Claims

1. A method for updating at least one reference value for monitoring a target server in a network, the method comprising:

determining whether the reference value is to be updated based on a predefined condition;

performing a Hyper Text Transfer Protocol-get (HTTP-get) operation on a reference Uniform Resource Locator (URL), in response to determining that the reference value is to be updated, the reference URL being one of the URL of the target server and the URL of a reference server in the network; and

hashing the result of the HTTP-get operation.

2. The method according to claim 1, wherein the predefined condition comprises content changes in the network.

3. The method according to claim 1, wherein the reference value indicates that one of the target server and the reference server is in a functioning state.

4. The method according to claim 1, wherein the reference value indicates that the reference server is in a malfunctioning state.

5. The method according to claim 1, wherein the method further comprises determining whether the result of the HTTP-get operation is valid based on a predetermined condition.

6. The method according to claim 5, wherein the predetermined condition comprises at least one of the headers being valid, length of URL being valid, connectivity being proper, Transfer Control Protocol (TCP) not being reset, and no HTTP error code being returned.

7. A method for monitoring a target server in a network, wherein the method comprises:

updating at least one reference value;

receiving a test Uniform Resource Locator (URL) of the target server;

determining a test value, the test value being determined from the test URL; and

determining the state of the target server, based on a comparison between the test value and the reference value.

8. The method according to claim 7, wherein updating at least one reference value comprises:

determining whether the reference value is to be updated based on a predefined condition;

performing a Hyper Text Transfer Protocol-get (HTTP-get) operation on a reference Uniform Resource Locator (URL), in response to determining that the reference value is to be updated, the reference URL being one of the URL of the target server and the URL of a reference server in the network; and

hashing the result of the HTTP-get operation performed on the reference URL.

9. The method according to claim 8, wherein the predefined condition comprises content changes in the network.

10. The method according to claim 8, wherein determining the test value comprises:

performing a Hyper Text Transfer Protocol-get (HTTP-get) operation on the test URL; and

hashing the result of the HTTP-get operation performed on the test URL.

11. The method according to claim 8, wherein the reference value indicates that one of the target server and the reference server is in a functioning state.

12. The method according to claim 8, wherein the reference value indicates that the reference server is in a malfunctioning state.

13. The method according to claim 7, wherein the target serverbeing in a functioning state, if the test value is equal to a reference good value, wherein the reference good value indicates that one of the target server and the reference server is in a functioning state.

14. The method according to claim 7, wherein the target server being in a malfunctioning state, if the test value is not equal to a reference good value, wherein the reference good value indicates that one of the target server and the reference server is in a functioning state.

15. The method according to claim 7, wherein the target server being in a malfunctioning state, if the test value is equal to a reference bad value, wherein the reference bad value indicates that the reference server is in a malfunctioning state.

16. The method according to claim 7, wherein the target server is in an ambiguous state, if the test value is neither equal to a reference good value, nor equal to a reference bad value, the reference good value being a reference value which indicates that one of the target server and the reference server is in a functioning state, and the reference bad value being another reference value which indicates that the reference server is in a malfunctioning state.

17. A system for updating at least one reference value for monitoring a target server in a network, the system comprising:

means for determining whether the reference value is to be updated based on a predefined condition;

means for performing a Hyper Text Transfer Protocol-get (HTTP-get) operation on a reference Uniform Resource Locator (URL), in response to determining that the reference value is to be updated, the reference URL being one of the URL of the target server and the URL of a reference server in the network; and

means for hashing the result of the HTTP-get operation.

18. A system for monitoring a target server in a network, wherein the system comprises:

a reference value updating unit for updating at least one reference value;

a test URL receiver for receiving a test Uniform Resource Locator (URL) of the target server;

a test value calculator for determining a test value, the test value being determined from the test URL; and

a server state determining unit for determining the state of the target server, based on a comparison between the test value and the reference value.

19. The system according to claim 18, wherein the reference value updating unit comprises:

a reference value updater for determining whether the reference value is to be updated based on a predefined condition;

a Hyper Text Transfer Protocol-get (HTTP-get) operator for performing an HTTP-get operation on a reference URL upon receiving a response from the reference value updater, the reference URL being one of the URL of the target server and the URL of a reference server in the network; and

a hash value calculator for hashing the result of the HTTP-get operation.

20. The system according to claim 18, wherein the test value calculator comprises:

a Hyper Text Transfer Protocol-get (HTTP-get) operating unit for performing an HTTP-get operation on a test URL; and

a hashing unit for hashing the result of the HTTP-get operation.

21. The system according to claim 18, wherein the target server being in a functioning state, if the test value is equal to a reference good value, wherein the reference good value indicates that one of the target server and the reference server is in a functioning state.

22. The system according to claim 18, wherein the target server being in a malfunctioning state, if the test value is not equal to a reference good value, wherein the reference good value indicates that one of the target server and the reference server is in a functioning state.

23. The system according to claim 18, wherein the target server being in a malfunctioning state, if the test value is equal to a reference bad value, wherein the reference bad value indicates that the reference server is in a malfunctioning state.

24. The system according to claim 18, wherein the target server is in an ambiguous state, if the test value is neither equal to a reference good value, nor equal to a reference bad value, the reference good value being a reference value which indicates that one of the target server and the reference server is in a functioning state, and the reference bad value being another reference value which indicates that the reference server is in a malfunctioning state.

25. A machine-readable medium including instructions for monitoring a target server in a network, executable by the processor comprising:

one or more instructions for updating at least one reference value;

one or more instructions for receiving a test Uniform Resource Locator (URL) of the target server;

one or more instructions for determining a test value, the test value being determined from the test URL; and

one or more instructions for determining the state of the target server, based on a comparison between the test value and the reference value.

26. An apparatus for monitoring a target server in a network, the apparatus comprising

a processing system including a processor coupled to a display and user input device;

and

a machine-readable medium including instructions executable by the processor comprising;

one or more instructions for updating at least one reference value;

one or more instructions for receiving a test Uniform Resource Locator (URL) of the target server;

one or more instructions for determining a test value, the test value being determined from the test URL; and

one or more instructions for determining the state of the target server, based on a comparison between the test value and the reference value.